Preview Ruby 4.1 is a preview. It can change before the final release. Switch to Ruby 4.0 →

instance method

Integer#integer?

() -> true

integer? → true

# File tmp/rubies/ruby-4.1.0-preview1/numeric.rb, line 202
def integer?
  true
end

Since self is already an Integer, always returns true.

See also #inspect #lcm #gcdlcm #magnitude also in 4.0 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0