atoi()

  #include <stdlib.h>

  

  int atoi(const char *s);

  

atoi() converts the string s to an integer value, skipping over white space at the beginning of s. It stops converting when it reaches either the end of the string or a character that cannot be part of the number. The number format accepted by atoi is the following:

  Number              = [+|-]Digit{Digit}

  

atoi() returns the converted integer value.

atof(),

atol(),

strtod(),

strtol(), and

strtoul()