Conversion of character string to integer (long long type)

[Classification]

Standard library

[Syntax]

#include <stdlib.h>

long long atoll(const char *str);

[Return value]

Returns the converted value if the partial character string could be converted. If it could not, 0 is returned.

[Description]

This function converts the first part of the character string indicated by str into a long long int type representation. atol is the same as "strtol (str, NULL, 10)".

[Caution]

The operation is undefined when the -Xansi option is specified.