C Language: atof function
(Convert String to Floating-Point)
In the C Programming Language, the atof function converts a string to a floating-point number (double).
The atof function skips all white-space characters at the beginning of the string, converts the subsequent characters as part of the number, and then stops when it encounters the first character that isn't a number.
Syntax
The syntax for the atof function in the C Language is:
double atof(const char *nptr);
Parameters or Arguments
- nptr
- A pointer to a string to convert to a floating-point number (double).
Returns
The atof function returns the floating-point representation of a string. The atof function skips all white-space characters at the beginning of the string, converts the subsequent characters as part of the number, and then stops when it encounters the first character that isn't a number.
Required Header
In the C Language, the required header for the atof function is:
#include <stdlib.h>
Applies To
In the C Language, the atof function can be used in the following versions:
- ANSI/ISO 9899-1990
Similar Functions
Other C functions that are similar to the atof function:
See Also
Other C functions that are noteworthy when dealing with the atof function:
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