strtoimax man page

strtoimax, strtoumax — convert string to integer


#include <inttypes.h>

intmax_t strtoimax(const char *nptr, char **endptr, int base);
uintmax_t strtoumax(const char *nptr, char **endptr, int base);


These functions are just like strtol(3) and strtoul(3), except that they return a value of type intmax_t and uintmax_t, respectively.

Return Value

On success, the converted value is returned. If nothing was found to convert, zero is returned. On overflow or underflow INTMAX_MAX or INTMAX_MIN or UINTMAX_MAX is returned, and errno is set to ERANGE.


For an explanation of the terms used in this section, see attributes(7).

Interface Attribute Value
strtoimax(), strtoumax() Thread safety MT-Safe locale

Conforming to

POSIX.1-2001, POSIX.1-2008, C99.

See Also

imaxabs(3), imaxdiv(3), strtol(3), strtoul(3), wcstoimax(3)


This page is part of release 4.11 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at

Referenced By


strtoumax(3) is an alias of strtoimax(3).

2015-08-08 Linux Programmer's Manual