Integer#-

self - numeric → numeric_result

VALUE
rb_int_minus(VALUE x, VALUE y)
{
    if (FIXNUM_P(x)) {
        return fix_minus(x, y);
    }
    else if (RB_BIGNUM_TYPE_P(x)) {
        return rb_big_minus(x, y);
    }
    return rb_num_coerce_bin(x, y, '-');
}

Performs subtraction:

Example

4 - 2              # => 2
-4 - 2             # => -6
-4 - -2            # => -2
4 - 2.0            # => 2.0
4 - Rational(2, 1) # => (2/1)
4 - Complex(2, 0)  # => (2+0i)

See also #+ #-@ #** #/ also in 4.1 · 4.0 · 3.4 · 3.2 · 3.1 · 3.0

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