What is integer.gcdlcm() in Ruby?

Overview

The gcdlcm() integer method returns an array that has the greatest common divisor and the least common multiple of two integers, that is, [gcd, lcm].

Syntax

int1.gcdlcm(int2)

Parameters

  • int1: This is the variable that has an integer value that invokes the gcdlcm() method.
  • int2: This is the second variable that has an integer value. It is passed inside the gcdlcm() method.

Return value

The value returned is an array that contains the greatest common divisor and the least common multiple of int1 and int2, that is, [gcd, lcm].

Code example

# create integer values
int1 = 20
int2 = 4
int3 = 15
int4 = 5
# get greatest common divisor
# and least common multiple
puts "#{int1.gcdlcm(4)}" # 20 and 4 = [4,20]
puts "#{int2.gcdlcm(2)}" # 4 and 2 = [2,4]
puts "#{int3.gcdlcm(3)}" # 15 and 3 = [3,15]
puts "#{int4.gcdlcm(100)}" # 5 and 100 = [5,100]

Code explanation

  • Lines 2–5: We create some integer values.
  • Lines 9–12: We use the gcdlcm() method to get the greatest common divisor and the least common multiple. Then, we print the results to the console.

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