printf en 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.
JayNue
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.