Swap a b
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print("Not using 3rd variable")
func swap( a: inout Int, b:inout Int) {
a = a + b
b = a - b
a = a - b
}
func swapB(_ a: inout Int,_ b: inout Int) {
a = a ^ b
b = a ^ b
a = a ^ b
}
var a:Int = 5, b = 7
swap(&a, &b)
print("number is: ", a, b)
swapB( &a, &b)
print("swap again:",a, b)
Swift
INFO