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─────Run-Time Library───────────────────────────────────────────────────────
 
  Include:   <stdlib.h>
 
  Syntax:    double strtod( char *nptr, char **endptr );
             long double _strtold ( char *nptr, char **endptr );
             long strtol( char *nptr, char **endptr, int base );
             unsigned long strtoul( char *nptr, char **endptr, int base );
 
  Returns:   (strtod) the converted value; overflow returns ±HUGE_VAL,
                      underflow returns 0.
             (_strtold) the long double-precision value of the floating-
                        point number if successful; _LHUGE_VAL on
                        overflow; otherwise, 0.
             (strtol) the converted value; overflow returns LONG_MAX or
                      LONG_MIN, depending on sign of converted value.
             (strtoul) the converted value if successful, or 0 if not;
                       and ULONG_MAX on overflow.
 
  See also:  atof, atol, _ecvt, _ltoa
                                    -♦-