Swift Double isLess()

In this tutorial, we will learn about the Swift Double isLess() method with the help of examples.

The isLess() method checks if one number is less than another or not.


// check is 9 is less than 3 or not var result = 9.isLess(than: 10) print(result)
// Output: true

isLess() Syntax

The syntax of the isLess() method is:

num.isLess(than: otherNumber)

Here, num is a number.

isLess() Parameters

The isLess() method takes one parameter

  • otherNumber - the value to test

isLess() Return Values

The isLess() method returns boolean value

  • true - if num is less of otherNumber
  • false - if num is greater than otherNumber

Example 1: Swift Double isLess()

// check if 4 less than 2 or not
var result1 = 4.isLess(than: 2)
print(result1) // check if 2 is less than 4 or not
var result2 = 2.isLess(than: 4)
print(result2) // check if 210 is less than 110 or not
var result3 = 210.isLess(than: 110)



Here, since 4 is not less than 2, the isLess() method returns false. However, 2 is less than 4, the method returns true.

Lastly, since 210 is multiple of 110, the method returns false.

Example 2: Using if…else With isLess()

// check if 88 is less than 88.2 or not if 88.isLess(than: 88.2) {
print("The condition is true") } else { print("The condition is false") }


The condition is true

Here, since 88 is less than 88.2, the code inside the if block is executed.

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