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