Swift -Zuordnungsbetreiber
// assign 5 to x
var x = 5
SAMER SAEID
// assign 5 to x
var x = 5// assign 10 to a
var a = 10
// assign 5 to b
var b = 5
// assign the sum of a and b to a
a += b // a = a + b
print(a)