To the power of in C

Question

So in python  all I have to do is  print 3  4     Which gives me 81  How do I do this in C  I searched a bit and say the exp   function  but have no clue how to use it  thanks in advance

User · Accepted Answer

You need pow    function from math h header  syntax     include  lt math h gt  double pow double x  double y   float powf float x  float y   long double powl long double x  long double y     Here x is base and y is exponent   result is x y      usage    pow 2 4      result is 2 4   16    this is math notation only       In c   is a bitwise operator   And make sure you include math h  to avoid warning    incompatible implicit declaration of built in function  pow        Link math library by using -lm while compiling  This is dependent on Your environment  For example if you use Windows it s not required to do so  but it is in UNIX based systems

User · Answer

Actually in C  you don t have an power operator  You will need to manually run a loop to get the result  Even the exp function just operates in that way only  But if you need to use that function  include the following header   include  lt math h gt    then you can use pow

User · Answer

include  lt math h gt    printf    d    int  pow  3  4

User · Answer

For another approach  note that all the standard library functions work with floating point types  You can implement an integer type function like this   unsigned power unsigned base  unsigned degree        unsigned result   1      unsigned term   base      while  degree                if  degree  amp  1              result    term          term    term          degree   degree  gt  gt  1            return result      This effectively does repeated multiples  but cuts down on that a bit by using the bit representation  For low integer powers this is quite effective

User · Answer

There s no operator for such usage in C  but a family of functions   double pow  double base   double exponent   float powf  float base    float exponent   long double powl  long double base  long double exponent     Note that the later two are only part of standard C since C99   If you get a warning like       incompatible implicit declaration of built in function  pow      That s because you forgot  include  lt math h gt

User · Answer

just use pow a b  which is exactly 3  4 in python

User · Answer

you can use pow base  exponent  from  include  lt math h gt   or create your own   int myPow int x int n        int i     Variable used in loop counter        int number   1       for  i   0  i  lt  n    i          number    x       return number

[c] To the power of in C?

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