strtod

Syntax

#include <stdlib.h>

double strtod(const char *s, char **endp);

Description

This function converts as many characters of s as look like a floating point number into that number. If endp is not a null pointer, *endp is set to point to the first unconverted character.

Return Value

The value the represented by s.

If a number represented by s doesn't fit into the range of values representable by the type double, the function returns either -HUGE_VAL (if s begins with the character -) or +HUGE_VAL, and sets errno to ERANGE.

Portability

ANSI, POSIX

Example

char *buf = "123ret";
char *bp;
double x = strtod(buf, &bp);

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