Swift Examples

Modern, safe, and expressive - Apple's language for iOS, macOS, and beyond.

Example 1: Adding two Numbers

Code

// Taking input from user
print("Enter first number: ", terminator: "")
if let input1 = readLine(), let a = Int(input1) {

    print("Enter second number: ", terminator: "")
    if let input2 = readLine(), let b = Int(input2) {

        // Calculating sum
        let sum = a + b

        // Displaying output
        print("Sum is: \(sum)")
    }
}

Input

Enter first number: 10  
Enter second number: 8

Output

Sum is: 18

Code Explanation

readLine() takes input as string, Int() converts to number.

Optional binding (if let) ensures safe conversion.

print() with \(sum) displays the result using string interpolation.