Ruby Newbie homepage Ruby Newbie homepage
  1. v3.1.2
  2. Integer
  3. truncate

How to use

Quick guide

Official content
Returns self truncated (toward zero) to a precision of ndigits decimal digits.
When ndigits is negative, the returned value has at least ndigits.abs trailing zeros:
555.truncate(-1)  # => 550
555.truncate(-2)  # => 500
-555.truncate(-2) # => -500
Returns self when ndigits is zero or positive.
555.truncate     # => 555
555.truncate(50) # => 555
Related: Integer#round.
 
               static VALUE
int_truncate(int argc, VALUE* argv, VALUE num)
{
    int ndigits;

    if (!rb_check_arity(argc, 0, 1)) return num;
    ndigits = NUM2INT(argv[0]);
    if (ndigits >= 0) {
        return num;
    }
    return rb_int_truncate(num, ndigits);
}

Was this page useful?