atoll() — Convert character string to signed long long

Format

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

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.

Related Information

• stdlib.h
• atoi() — Convert character string to integer
• atol() — Convert character string to long
• strtol() — Convert Character String to Long
• strtoll() — Convert String to Signed Long Long
• strtoul() — Convert String to Unsigned Integer
• strtoull() — Convert String to Unsigned Long Long