Swift program to create a constant

Program/Source Code:

The source code to create a constant is given below. The given program is compiled and executed successfully.

// Swift program to create a constant

let num:Int = 10;

// error: cannot assign to value: 'num' is a 'let' constant
// num = 20;

print("Num: ",num);

Output:

Num:  10


...Program finished with exit code 0
Press ENTER to exit console.

Explanation:

In the above program, we created an integer constant num using the let keyword initialized with 10. We cannot modify the value of created constant during the program, it will generate an error. Then we printed the value of num on the console screen.