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Scala - Program to swap two numbers without using third variable Code Example

The code for Program to swap two numbers without using third variable

// Scala program to swap two numbers 
// without using 3rd variable

object Sample{  
  def main(args:Array[String]){
    var num1:Int = 10;
    var num2:Int = 20;
    
    println("Numbers before swapping:")
    printf("\tNum1:%d\n",num1)
    printf("\tNum2:%d\n",num2)
    
    num1 = num1 + num2
    num2 = num1 - num2
    num1 = num1 - num2
    
    println("Numbers after swapping:")
    printf("\tNum1:%d\n",num1)
    printf("\tNum2:%d\n",num2)
  }  
}

/*
Output:
Numbers before swapping:
	Num1:10
	Num2:20
Numbers after swapping:
	Num1:20
	Num2:10
*/