# JavaScript code to find largest of three numbers

This JavaScript code will read three numbers in a text box and it will return the largest number from given/input three numbers.
Submitted by Aleesha Ali, on March 25, 2018

Given three numbers and we have to find its largest number using JavaScript.

## JavaScript code to find largest of three numbers

```<script>
function largest()
{
var num1, num2, num3;
num1 = Number(document.getElementById("N").value);
num2 = Number(document.getElementById("M").value);
num3 = Number(document.getElementById("O").value);

if(num1>num2 && num1>num3)
{
}
else if(num2>num1 && num2>num3)
{
}
else if(num3>num1 && num3>num1)
{
}
}
</script>
```

## Calling JavaScript function in HTML (HTML, JS Code)

```<html>
<script>
function largest()
{
var num1, num2, num3;
num1 = Number(document.getElementById("N").value);
num2 = Number(document.getElementById("M").value);
num3 = Number(document.getElementById("O").value);

if(num1>num2 && num1>num3)
{
}
else if(num2>num1 && num2>num3)
{
}
else if(num3>num1 && num3>num1)
{
}
}
</script>
<body>
<h1>Calculate largest among three numbers</h1>
<hr color="cyan">
<br>
Enter number 1: <input type="text" id="N"></input><br>
Enter number 2: <input type="text" id="M"></input><br>
Enter number 3: <input type="text" id="O"></input><br>
<hr color="cyan">
<center><button onclick="largest()">OK</button>
</body>
</html>
```

Output