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Man Pages


Manual Reference Pages  -  ATOL (3)

NAME

atol, atoll - convert ASCII string to
.Vt long or
.Vt long long integer

CONTENTS

Library
Synopsis
Description
Compatibility
Errors
See Also
Standards

LIBRARY


.Lb libc

SYNOPSIS


.In stdlib.h long atol const char *nptr long long atoll const char *nptr

DESCRIPTION

The atol function converts the initial portion of the string pointed to by nptr to
.Vt long integer representation.

It is equivalent to:

    strtol(nptr, (char **)NULL, 10);

The atoll function converts the initial portion of the string pointed to by nptr to
.Vt long long integer representation.

It is equivalent to:

    strtoll(nptr, (char **)NULL, 10);

COMPATIBILITY

The
.Fx implementations of the atol and atoll functions are thin wrappers around strtol and strtoll respectively, so these functions will affect the value of errno in the same way that the strtol and strtoll functions are able to. This behavior of atol and atoll is not required by -isoC or -isoC-99, but it is allowed by all of -isoC, -isoC-99 and -p1003.1-2001.

ERRORS

The functions atol and atoll may affect the value of errno on an error.

SEE ALSO

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

STANDARDS

The atol function conforms to -isoC. The atoll function conforms to -isoC-99.
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