How to use if statements in Underscore.js templates ?

Underscore.js is a javascript library that provides helper functions in functional programming without extending the built-in objects. This package consists of 100 functions like map, filter, etc. 

We can install this by using npm.

npm install underscore

Syntax:

const _ = require('underscore');

Approach:

• Write your markup code regarding the requirement.
• We should always place the underscore.js code inside the <script> tag.
• In this case, Write the if and else logic based upon a problem statement.
• Once the code is error-free we can surf the file as usual.
• In this way, we need to write the code in <script> tag;

Example: This example shows the use of the above-explained approach.

Output:

Number doesn't exist