title: Program Check Input Integer String
signature: func programCheckInputIntegerString(s string) bool {
source_py: def program_check_input_integer_string(s):
      for i in range(len(s)):
          if (s[i].isdigit() != True):
              return False
      return True
source_cpp: bool program_check_input_integer_string(string s) {
    for ( int i = 0;
    i < s . length ( );
    i ++ ) if ( isdigit ( s [ i ] ) == false ) return false;
    return true;
  }