var a = 10
var b = 20
let mul = a*b
let sub = a-b
let add = a+b
let div = a/b
let mod = a%b
print(add, sub, mul, div, mod)//all ooperators*/
//
var ab = 10
var bb:Float = 20
let addd = a+Int(b)
print(addd)

var ac = 10
var bc = 10
print(ac==bc)
print(ac>=bc)
print(ac<=bc)
print(ac>bc)
print(ac<bc)

var abb = 10
var bbb = 20
if abb == bbb{
  print("s")
}else{
  print("f")
}