atoi - convert a string to an integer.
#include <stdlib.h> int atoi(const char *nptr));
The atoi() function converts the initial portion of the string pointed to by nptr to int. The behaviour is the same as strtol(nptr, (char **)NULL, 10); except that atoi() does not detect errors.
The converted value.
SVID 3, POSIX, BSD 4.3, ISO 9899
atof(3), atol(3), strtod(3),