In this tutorial, we will learn how to find the Least Common Multiple (LCM) of two numbers in Go. We will cover the basic concept of LCM and implement functions using both the mathematical formula and the Euclidean algorithm.

The Least Common Multiple (LCM) of two or more integers is the smallest positive integer that is divisible by each of the integers. For example, the LCM of 4 and 5 is 20.

The syntax to find the LCM of two numbers in Go is:

```
func gcd(a, b int) int {
for b != 0 {
a, b = b, a % b
}
return a
}
func lcm(a, b int) int {
return a * b / gcd(a, b)
}
```

We can use the Euclidean algorithm to find the LCM of two numbers by first finding their GCD and then using the relationship between GCD and LCM.

For example,

- Define a helper function named
`gcd`

that takes two parameters`a`

and`b`

of type`int`

and returns their GCD using the Euclidean algorithm. - Define a function named
`lcm`

that takes two parameters`a`

and`b`

of type`int`

. - Calculate the LCM using the formula
`a * b / gcd(a, b)`

. - Return the calculated LCM.
- In the main function, call the
`lcm`

function with sample values and print the result.

```
package main
import (
"fmt"
)
func gcd(a, b int) int {
for b != 0 {
a, b = b, a % b
}
return a
}
func lcm(a, b int) int {
return a * b / gcd(a, b)
}
func main() {
// Find the LCM of 4 and 5
result := lcm(4, 5)
// Print the result
fmt.Printf("LCM of 4 and 5 is %d\n", result)
}
```

LCM of 4 and 5 is 20