 # Swift Double isLess()

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

### Example

``````// 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)
print(result3)``````

Output

```false
true
false```

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")
}``````

Output

```
The condition is true```

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