How to get numeric value from a prompt box

Question

I was trying to do some simple mathematical calculations in HTML and jQuery and JavaScript  so I wanted to get input from user  For input I tried doing this     var x   prompt  Enter a Value   0     var y   prompt  Enter a Value    0      But I am not able to perform any kind of calculations as these values are strings  Please  can any one show me how to convert them into integers

User · Answer

JavaScript will  convert  numeric string to integer  if you perform calculations on it  as JS is weakly typed   But you can convert it yourself using parseInt or parseFloat   Just remember to put radix in parseInt   In case of integer inputs   var x   parseInt prompt  Enter a Value    0    10   var y   parseInt prompt  Enter a Value    0    10     In case of float   var x   parseFloat prompt  Enter a Value    0     var y   parseFloat prompt  Enter a Value    0

User · Answer

You can use parseInt   but  as mentioned  the radix  base  should be specified   x   parseInt x  10   y   parseInt y  10     10 means a base-10 number   See this link for an explanation of why the radix is necessary

User · Answer

parseInt   or parseFloat   are functions in JavaScript which can help you convert the values into integers or floats respectively   Syntax    parseInt string  radix    parseFloat string       string  the string expression to be parsed as a number  radix   optional  but highly encouraged  the base of the numeral system to be used - a number between 2 and 36     Example    var x   prompt  Enter a Value    0     var y   prompt  Enter a Value    0     var num1   parseInt x    var num2   parseInt y     After this you can perform which ever calculations you want on them

User · Answer

var xInt   parseInt x    This will return either the integer value  or NaN   Read more about parseInt here

User · Answer

Working Demo Reading more Info  parseInt x  it will cast it into integer   x   parseInt x   x   parseInt x 10     the radix is 10  decimal    parseFloat x  it will cast it into float  Working Demo Reading more Info  x   parseFloat x     you can directly use prompt  var x   parseInt prompt  Enter a Number    1    10

User · Answer

You have to use parseInt   to convert  For eg     var z   parseInt x    parseInt y     use parseFloat   if you want to handle float value

[javascript] How to get numeric value from a prompt box?

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