#    
## 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
```ruby
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.


What is integer.gcdlcm() in Ruby?

The gcdlcm() method in Ruby returns an array with the greatest common divisor and least common multiple of two integers.