# C++ Math less()

The less() function determines whether the value of first argument is less than the value of second argument. If first argument is less than the second argument then it returns 1 otherwise 0.

## Syntax

Consider two numbers 'x' and 'y'. Syntax would be:

## Parameter

(x,y): The values which we want to compare.

## Return value

Parameter(x,y) Return value
x 1
x>y or x=nan or y=nan 0

## Example 1

Let's see a simple example when both x and y are of same type.

Output:

```Values of x and y are : 1.2,1.3
isless(x,y) : 1
```

In this example, isless() function determines that the value of x is less than y. Therefore, it returns 1.

## Example 2

Let's see a simple example when both x and y are of different type.

Output:

```Values of x and y are : 7.2,5
isless(x,y) :0
```

In this example, isless() function determines that the value of x is not less than y. Therefore, it returns 0.

## Example 3

Let's see a simple example when the value of x is nan.

Output:

```Values of x and y are : nan,5.67
isless(x,y) : 0
```

In this example, value of x is nan. Therefore, the function returns 0.

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