swift print
print("Hello World") //printing a value let num = 5 print(num) print("a num: " + num) //concatenation print("a num: \(num)") //interpolation
printf in swift
let x = 3.1415926 print(String(format: "%.2f", x)) //3.14 print(String(format: "%2.2f", x)) // 3.14 (two blank spaces in front of 3.