initialising variables
int a = 1 ; int b = 2 ; int c = 3 ; int d = 4 ; Console . WriteLine ( " values ▁ before ▁ " + " swapping ▁ are ▁ : ▁ " ) ; Console . WriteLine ( " a ▁ = ▁ " + a ) ; Console . WriteLine ( " b ▁ = ▁ " + b ) ; Console . WriteLine ( " c ▁ = ▁ " + c ) ; Console . WriteLine ( " d ▁ = ▁ " + d ) ; Console . WriteLine ( " " ) ;