exp(3m) exp(3m)[top]Nameexp, expm1, log, log10, log1p, pow, sqrt - exponential, logarithm, power, square rootSyntax#include <math.h> double exp(x) double x; double expm1(x) double x; double log(x) double x; double log10(x) double x; double log1p(x) double x; double pow(x,y) double x,y; double sqrt(x) double x;DescriptionThe function returns the exponential function of x. The function returns exp(x)-1 accurately even for tiny x. The function returns the natural logarithm of x; returns the base 10 logarithm. The function returns log(1+x) accurately even for tiny x. The function returns x raised to the y power. The function returns the square root of x.Return ValuesThe function returns HUGE_VAL and sets errno to ERANGE when the correct value would overflow. When the correct value would underflow it returns zero and errno is set to ERANGE. The function returns HUGE_VAL and sets errno to ERANGE when the correct value would overflow. When the correct value would underflow it returnsThe and functions return-1.and set errno to EDOM when x is less than or equal to zero. When the correct value would overflow flow they return-HUGE_VALand errno is set to ERANGE. The function returns-HUGE_VALand sets errno to EDOM when x is less than or equal to-HUGE_VALWhen the correct value would overflow flow it returns-1.and errno is set to ERANGE. The function has many special cases. When x and y are both zero it returns 1.0. When x is negative and y is not an integer value it returns zero and errno is set to EDOM. When x is zero and y is nega‐ tive it returns-HUGE_VALand errno is set to EDOM. When the correct value would overflow HUGE_VAL is returned and errno is set to ERANGE. When the correct value would underflow zero is returned and errno is set to ERANGE. The function returns zero and sets errno to EDOM when x is negative.-HUGE_VALEnvironmentWhen your program is compiled using the System V environment, returns HUGE when the correct value would overflow, and sets errno to ERANGE; returns zero when the correct value would underflow, and sets errno to ERANGE. The and functions return HUGE and set errno to EDOM when x is nonposi‐ tive. An error message is printed on the standard error output. The function returns zero and sets errno to EDOM when x is non-positive and y is not an integer, or when x and y are both zero. In these cases, a message indicating DOMAIN error is printed on the standard error output. When the correct value for would overflow, returns HUGE and sets errno to ERANGE. The function returns zero and sets errno to EDOM when x is negative. A message indicating DOMAIN error is printed on the standard error out‐ put. These error-handling procedures may be changed with the function DOMAIN error is only printed in the System V environment.See Alsohypot(3m), intro(3m), sinh(3m) VAX exp(3m)

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