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Swift program to create a constant

Here, we are going to learn how to create a constant in Swift programming language?
Submitted by Nidhi, on May 29, 2021

Problem Solution:

Here, we will create an integer constant using the let keyword. We can initialize the constant at the time of declaration. We cannot change the value of constant during the program.

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.

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