# GO Program to Find LCM and GCD of given two numbers

Example of Switch ..... Case to calculate the LCM and GCD of two integers. The For...Loop used as a While Loop in this example.
```//Golang Program to find LCM and GCD of two numbers
package main
import "fmt"

/* Function without return declaration*/
func lcm(temp1 int,temp2 int) {
var lcmnum int =1
if(temp1>temp2)    {
lcmnum=temp1
}else{
lcmnum=temp2
}
/* Use of For Loop as a While Loop*/
for {
if(lcmnum%temp1==0 && lcmnum%temp2==0) {    // And operator
/*  Print Statement with multiple variables   */
fmt.Printf("LCM of %d and %d is %d",temp1,temp2,lcmnum)
break
}
lcmnum++
}
return // Return without any value
}

func gcd(temp1 int,temp2 int){
var gcdnum int
/* Use of And operator in For Loop */
for i := 1; i <=temp1 && i <=temp2 ; i++ {
if(temp1%i==0 && temp2%i==0) {
gcdnum=i
}
}
fmt.Printf("GCD of %d and %d is %d",temp1,temp2,gcdnum)
return
}

func main() {
var n1,n2,action int
fmt.Println("Enter two positive integers : ")
fmt.Scanln(&n1)
fmt.Scanln(&n2)

fmt.Println("Enter 1 for LCM and 2 for GCD")
fmt.Scanln(&action)
/*  Use of Switch Case in Golang */
switch action {
case 1:
lcm(n1,n2)
case 2:
gcd(n1,n2)
}
}
```