How to Declare an Int Variable in Swift?

Declare Int Variable

To declare a variable of type Int in Swift, use : Int after the variable name.

var age: Int

Swift Example

Let us write a swift program, in which we declare a variable with the name age, and declare this variable as type Int. Later, we will assign a value 25 to this variable and print it.

main.swift

import Foundation

var age: Int
age = 25
print(age)

Program Output

25

The type of the variable age is Int, because of which we could assign an Int value to the variable.

We can also programmatically check the type of the variable age using type(of:) function.

main.swift

import Foundation

var age: Int
print(type(of: age))

Program Output

Int

Summary

We have learnt how to declare a variable of type Int in Swift.