atoll() — Convert character string to signed long long

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 about how to make long long available.

General description

The atoll() function 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.

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