atoll() — Convert character string to signed long long

Standards

Standards / Extensions	C or C++	Dependencies
C99 Single UNIX Specification, Version 3 C++ TR1 C99	both	z/OS® V1R7

Format

#define _ISOC99_SOURCE
#include <stdlib.h>
long long atoll(const char *nptr);

Compile requirement: Use of this function requires the long long data type. See z/OS XL C/C++ Language Reference for information on how to make long long available.

General description

atoll() converts the initial portion of the string pointed to by nptr to a 'long long int'. This is equivalent to strtoll(nptr, (char **)NULL, 10).

Returned value

If successful, atoll() returns the converted signed long long value, represented in the string. If unsuccessful, it returns an undefined value.

Related information

stdlib.h
atof() — Convert character string to double
atoi() — Convert character string to integer
atol() — Convert character string to long
fscanf(), scanf(), sscanf() — Read and format data
strtod() — Convert character string to double
strtol() — Convert character string to long
strtoul() — Convert string to unsigned integer