What is the usage of pow function in C language?

In the C language, the pow() function is used to find the y power of x. x, y and function values are all double type, and their syntax is "double pow(double x, double y)"; the parameter "double x" represents the base; the parameter "double y" represents the exponent.

pow() function is used to find the y power of x. x, y and function values are all double type, and its prototype is: double pow(double x, double y).

The example code is as follows:

#include #include void main() { double x = 2, y = 10; printf("%f\n",pow(x, y)); return 0; }

##Extended information:

When calling the pow function, errors may occur:

If the base x is a negative number and the exponent y is not an integer, a domain error will occur.

If the base x and the exponent y are both 0, it may cause a domain error? error, or it may not; this is related to the implementation of the library.

If the base x is 0 and the exponent y is a negative number, it may cause a domain error or pole error, or it may not; this is related to the implementation of the library.

If the return value ret is too large or too small, a range error will occur.

Error code:

If a domain error occurs, then the global variable errno will be set to EDOM;

If a pole error or range error occurs, then the global variable errno will be set to ERANGE.

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