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Man Pages


Manual Reference Pages  -  ATOF (3)

NAME

atof - convert ASCII string to double

CONTENTS

Library
Synopsis
Description
Implementation Notes
Errors
See Also
Standards

LIBRARY


.Lb libc

SYNOPSIS


.In stdlib.h double atof const char *nptr

DESCRIPTION

The atof function converts the initial portion of the string pointed to by nptr to
.Vt double representation.

It is equivalent to:

strtod(nptr, (char **)NULL);

The decimal point character is defined in the program’s locale (category LC_NUMERIC).

IMPLEMENTATION NOTES

The atof function is not thread-safe and also not async-cancel-safe.

The atof function has been deprecated by strtod and should not be used in new code.

ERRORS

The function atof need not affect the value of errno on an error.

SEE ALSO

atoi(3), atol(3), strtod(3), strtol(3), strtoul(3)

STANDARDS

The atof function conforms to -p1003.1-90, -isoC, and -isoC-99.
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