Make a negative number positive

Question

I have a Java method in which I m summing a set of numbers  However  I want any negatives numbers to be treated as positives  So  1   2   1   -1  should equal 5    I m sure there is very easy way of doing this - I just don t know how

User · Answer

Use the abs function   int sum 0  for Integer i   container    sum  Math abs i

User · Answer

The concept you are describing is called  absolute value   and Java has a function called Math abs to do it for you   Or you could avoid the function call and do it yourself   number    number  lt  0   -number   number     or   if  number  lt  0      number   -number

User · Answer

If you re interested in the mechanics of two s complement  here s the absolutely inefficient  but illustrative low-level way this is made   private static int makeAbsolute int number        if number  gt  0           return number         else          return   number  1

User · Answer

String s    -1139627840   BigInteger bg1   new BigInteger s   System out println bg1 abs       Alternatively   int i   -123  System out println Math abs i

User · Answer

I see people are saying that Math abs number  but this method is not full proof  This fails when you try to wrap Math abs Integer MIN VALUE   see ref  https   youtu be IWrpDP-ad7g  If you are not sure whether you are going to receive the Integer MIN VALUE in the input  It is always recommended to check for that number and handle it manually

User · Answer

You re looking for absolute value  mate  Math abs -5  returns 5

User · Answer

dont do this  number    number  lt  0   -number   number    or  if  number  lt  0  number   -number   this will be an bug when you run find bug on your code it will report it as RV NEGATING RESULT OF

User · Answer

When you need to represent a value without the concept of a loss or absence  negative value   that is called  absolute value      The logic to obtain the absolute value is very simple   If it s positive  maintain it  If it s negative  negate it      What this means is that your logic and code should work like the following     If value is negative    if   value  lt  0            negate it  make it a negative negative-value  thus a positive value     value   negate value         There are 2 ways you can negate a value    By  well  negating it s value  value    -value   By multiplying it by  100  negative   or  -1   value   value    -1     Both are actually two sides of the same coin  It s just that you usually don t remember that value    -value   is actually value   1    -value       Well  as for how you actually do it in Java  it s very simple  because Java already provides a function for that  in the Math class  value   Math abs value    Yes  doing it without Math abs   is just a line of code with very simple math  but why make your code look ugly  Just use Java s provided Math abs   function  They provide it for a reason   If you absolutely need to skip the function  you can use value    value  lt  0     -value    value   which is simply a more compact version of the code I mentioned in the logic  3rd  section  using the Ternary operator           Additionally  there might be situations where you want to always represent loss or absence within a function that might receive both positive and negative values   Instead of doing some complicated check  you can simply get the absolute value  and negate it  negativeValue    -Math abs value       With that in mind  and considering a case with a sum of multiple numbers such as yours  it would be a nice idea to implement a function   int getSumOfAllAbsolutes int   values     int total   0    for int i 0  i lt values lenght  i         total    Math abs values i          return total        Depending on the probability you might need related code again  it might also be a good idea to add them to your own  utils  library  splitting such functions into their core components first  and  maintaining the final function simply as a nest of calls to the core components  now-split functions   int   makeAllAbsolute int   values        TIP  You can also make a reference-based version of this function  so that allocating  absolutes    is not needed  thus optimizing    int   absolutes   values clone      for int i 0  i lt values lenght  i         absolutes i    Math abs values i          return absolutes     int getSumOfAllValues int   values     int total   0    for int i 0  i lt values lenght  i         total    values i       return total     int getSumOfAllAbsolutes int   values     return getSumOfAllValues makeAllAbsolute values

User · Answer

Just call Math abs  For example  int x   Math abs -5    Which will set x to 5  Note that if you pass Integer MIN VALUE  the same value  still negative  will be returned  as the range of int does not allow the positive equivalent to be represented

User · Answer

You want to wrap each number into Math abs    e g   System out println Math abs -1      prints out  1    If you want to avoid writing the Math -part  you can include the Math util statically  Just write   import static java lang Math abs    along with your imports  and you can refer to the abs  -function just by writing  System out println abs -1

User · Answer

I would recommend the following solutions   without lib fun       value    value value  value    The above does not actually work    with lib fun       value   Math abs value

User · Answer

Try this in the for loop  sum    Math abs arr i

User · Answer

Library function Math abs   can be used  Math abs   returns the absolute value of the argument          if the argument is negative  it returns the negation of the argument      if the argument is positive  it returns the number as it is         e g    int x -5  System out println Math abs x      Output  5   int y 6  System out println Math abs y      Output  6

User · Answer

This code is not safe to be called on positive numbers    int x   -20 int y   x    2  -1 x       Therefore y   -20    40    20

User · Answer

I needed the absolute value of a long   and looked deeply into Math abs and found that if my argument is less than LONG MIN VAL which is -9223372036854775808l  then the abs function would not return an absolute value but only the minimum value  Inthis case if your code is using this abs value further then there might be an issue

User · Answer

You want to wrap each number into Math abs    e g   System out println Math abs -1      prints out  1    If you want to avoid writing the Math -part  you can include the Math util statically  Just write   import static java lang Math abs    along with your imports  and you can refer to the abs  -function just by writing  System out println abs -1

User · Answer

Try this  the negative in front of the x is valid since it is a unary operator  find more here   int answer   -x   With this  you can turn a positive to a negative and a negative to a positive   However  if you want to only make a negative number positive then try this  int answer   Math abs x     A little cool math trick  Squaring the number will guarantee a positive value of x 2  and then  taking the square root will get you to the absolute value of x  int answer   Math sqrt Math pow x  2     Hope it helps  Good Luck

User · Answer

Can you please try this one       public static int toPositive int number        return number  amp  0x7fffffff

User · Answer

I would recommend the following solutions   without lib fun       value    value value  value    The above does not actually work    with lib fun       value   Math abs value

User · Answer

The concept you are describing is called  absolute value   and Java has a function called Math abs to do it for you   Or you could avoid the function call and do it yourself   number    number  lt  0   -number   number     or   if  number  lt  0      number   -number

User · Answer

You want to wrap each number into Math abs    e g   System out println Math abs -1      prints out  1    If you want to avoid writing the Math -part  you can include the Math util statically  Just write   import static java lang Math abs    along with your imports  and you can refer to the abs  -function just by writing  System out println abs -1

User · Answer

Are you asking about absolute values   Math abs      is the function you probably want

User · Answer

Use the abs function   int sum 0  for Integer i   container    sum  Math abs i

User · Answer

if arr i  lt 0   Math abs arr i       1st way  taking absolute value   arr i  - arr i      2nd way  taking -ve of -ve no  yields a  ve no    arr i     arr i -1       3rd way  taking negation

User · Answer

The easiest  if verbose way to do this is to wrap each number in a Math abs   call  so you would add   Math abs 1    Math abs 2    Math abs 1    Math abs -1    with logic changes to reflect how your code is structured   Verbose  perhaps  but it does what you want

User · Answer

Can you please try this one       public static int toPositive int number        return number  amp  0x7fffffff

User · Answer

If you re interested in the mechanics of two s complement  here s the absolutely inefficient  but illustrative low-level way this is made   private static int makeAbsolute int number        if number  gt  0           return number         else          return   number  1

User · Answer

Are you asking about absolute values   Math abs      is the function you probably want

User · Answer

The easiest  if verbose way to do this is to wrap each number in a Math abs   call  so you would add   Math abs 1    Math abs 2    Math abs 1    Math abs -1    with logic changes to reflect how your code is structured   Verbose  perhaps  but it does what you want

User · Answer

You re looking for absolute value  mate  Math abs -5  returns 5

User · Answer

You want to wrap each number into Math abs    e g   System out println Math abs -1      prints out  1    If you want to avoid writing the Math -part  you can include the Math util statically  Just write   import static java lang Math abs    along with your imports  and you can refer to the abs  -function just by writing  System out println abs -1

User · Answer

I needed the absolute value of a long   and looked deeply into Math abs and found that if my argument is less than LONG MIN VAL which is -9223372036854775808l  then the abs function would not return an absolute value but only the minimum value  Inthis case if your code is using this abs value further then there might be an issue

User · Answer

I see people are saying that Math abs number  but this method is not full proof  This fails when you try to wrap Math abs Integer MIN VALUE   see ref  https   youtu be IWrpDP-ad7g  If you are not sure whether you are going to receive the Integer MIN VALUE in the input  It is always recommended to check for that number and handle it manually

User · Answer

String s    -1139627840   BigInteger bg1   new BigInteger s   System out println bg1 abs       Alternatively   int i   -123  System out println Math abs i

User · Answer

To convert negative number to positive number  this is called absolute value   uses Math abs    This Math abs   method is work like this    number    number  lt  0   -number   number   quot   In below example  Math abs -1  will convert the negative number 1 to positive 1   example  public static void main String   args        int total   1   1   1   1    -1              output 3     System out println  quot Total    quot    total            int total2   1   1   1   1   Math abs -1              output 5     System out println  quot Total 2  absolute value     quot    total2            Output Total   3 Total 2  absolute value    5

User · Answer

Just call Math abs  For example  int x   Math abs -5    Which will set x to 5  Note that if you pass Integer MIN VALUE  the same value  still negative  will be returned  as the range of int does not allow the positive equivalent to be represented

User · Answer

You re looking for absolute value  mate  Math abs -5  returns 5

User · Answer

Why don t you multiply that number with -1   Like This      Given x as the number  if x is less than 0  return 0 - x  otherwise return x  return  x  lt   0 0F    0 0F - x   x

User · Answer

The concept you are describing is called  absolute value   and Java has a function called Math abs to do it for you   Or you could avoid the function call and do it yourself   number    number  lt  0   -number   number     or   if  number  lt  0      number   -number

User · Answer

This code is not safe to be called on positive numbers    int x   -20 int y   x    2  -1 x       Therefore y   -20    40    20

User · Answer

The concept you are describing is called  absolute value   and Java has a function called Math abs to do it for you   Or you could avoid the function call and do it yourself   number    number  lt  0   -number   number     or   if  number  lt  0      number   -number

User · Answer

Try this in the for loop  sum    Math abs arr i

User · Answer

To convert negative number to positive number  this is called absolute value   uses Math abs    This Math abs   method is work like this    number    number  lt  0   -number   number   quot   In below example  Math abs -1  will convert the negative number 1 to positive 1   example  public static void main String   args        int total   1   1   1   1    -1              output 3     System out println  quot Total    quot    total            int total2   1   1   1   1   Math abs -1              output 5     System out println  quot Total 2  absolute value     quot    total2            Output Total   3 Total 2  absolute value    5

User · Answer

Library function Math abs   can be used  Math abs   returns the absolute value of the argument          if the argument is negative  it returns the negation of the argument      if the argument is positive  it returns the number as it is         e g    int x -5  System out println Math abs x      Output  5   int y 6  System out println Math abs y      Output  6

User · Answer

Are you asking about absolute values   Math abs      is the function you probably want

User · Answer

dont do this  number    number  lt  0   -number   number    or  if  number  lt  0  number   -number   this will be an bug when you run find bug on your code it will report it as RV NEGATING RESULT OF

User · Answer

Why don t you multiply that number with -1   Like This      Given x as the number  if x is less than 0  return 0 - x  otherwise return x  return  x  lt   0 0F    0 0F - x   x

User · Answer

You re looking for absolute value  mate  Math abs -5  returns 5

User · Answer

if arr i  lt 0   Math abs arr i       1st way  taking absolute value   arr i  - arr i      2nd way  taking -ve of -ve no  yields a  ve no    arr i     arr i -1       3rd way  taking negation

User · Answer

Just call Math abs  For example  int x   Math abs -5    Which will set x to 5  Note that if you pass Integer MIN VALUE  the same value  still negative  will be returned  as the range of int does not allow the positive equivalent to be represented

User · Answer

When you need to represent a value without the concept of a loss or absence  negative value   that is called  absolute value      The logic to obtain the absolute value is very simple   If it s positive  maintain it  If it s negative  negate it      What this means is that your logic and code should work like the following     If value is negative    if   value  lt  0            negate it  make it a negative negative-value  thus a positive value     value   negate value         There are 2 ways you can negate a value    By  well  negating it s value  value    -value   By multiplying it by  100  negative   or  -1   value   value    -1     Both are actually two sides of the same coin  It s just that you usually don t remember that value    -value   is actually value   1    -value       Well  as for how you actually do it in Java  it s very simple  because Java already provides a function for that  in the Math class  value   Math abs value    Yes  doing it without Math abs   is just a line of code with very simple math  but why make your code look ugly  Just use Java s provided Math abs   function  They provide it for a reason   If you absolutely need to skip the function  you can use value    value  lt  0     -value    value   which is simply a more compact version of the code I mentioned in the logic  3rd  section  using the Ternary operator           Additionally  there might be situations where you want to always represent loss or absence within a function that might receive both positive and negative values   Instead of doing some complicated check  you can simply get the absolute value  and negate it  negativeValue    -Math abs value       With that in mind  and considering a case with a sum of multiple numbers such as yours  it would be a nice idea to implement a function   int getSumOfAllAbsolutes int   values     int total   0    for int i 0  i lt values lenght  i         total    Math abs values i          return total        Depending on the probability you might need related code again  it might also be a good idea to add them to your own  utils  library  splitting such functions into their core components first  and  maintaining the final function simply as a nest of calls to the core components  now-split functions   int   makeAllAbsolute int   values        TIP  You can also make a reference-based version of this function  so that allocating  absolutes    is not needed  thus optimizing    int   absolutes   values clone      for int i 0  i lt values lenght  i         absolutes i    Math abs values i          return absolutes     int getSumOfAllValues int   values     int total   0    for int i 0  i lt values lenght  i         total    values i       return total     int getSumOfAllAbsolutes int   values     return getSumOfAllValues makeAllAbsolute values

User · Answer

Just call Math abs  For example  int x   Math abs -5    Which will set x to 5  Note that if you pass Integer MIN VALUE  the same value  still negative  will be returned  as the range of int does not allow the positive equivalent to be represented

User · Answer

Try this  the negative in front of the x is valid since it is a unary operator  find more here   int answer   -x   With this  you can turn a positive to a negative and a negative to a positive   However  if you want to only make a negative number positive then try this  int answer   Math abs x     A little cool math trick  Squaring the number will guarantee a positive value of x 2  and then  taking the square root will get you to the absolute value of x  int answer   Math sqrt Math pow x  2     Hope it helps  Good Luck

User · Answer

Use the abs function   int sum 0  for Integer i   container    sum  Math abs i

User · Answer

The easiest  if verbose way to do this is to wrap each number in a Math abs   call  so you would add   Math abs 1    Math abs 2    Math abs 1    Math abs -1    with logic changes to reflect how your code is structured   Verbose  perhaps  but it does what you want

User · Answer

In kotlin you can use unaryPlus  input   input unaryPlus     https   kotlinlang org api latest jvm stdlib kotlin -int unary-plus html

User · Answer

Use the abs function   int sum 0  for Integer i   container    sum  Math abs i

User · Answer

The easiest  if verbose way to do this is to wrap each number in a Math abs   call  so you would add   Math abs 1    Math abs 2    Math abs 1    Math abs -1    with logic changes to reflect how your code is structured   Verbose  perhaps  but it does what you want

User · Answer

In kotlin you can use unaryPlus  input   input unaryPlus     https   kotlinlang org api latest jvm stdlib kotlin -int unary-plus html

User · Answer

Are you asking about absolute values   Math abs      is the function you probably want

[java] Make a negative number positive

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