Interpolation in Angular

Interpolation in Angular is a fundamental feature that allows you to bind data from your component to your HTML templates. It is denoted by double curly braces {{ }} and is one of the ways to perform data binding in Angular.

Here's how interpolation works:

1. Binding Data: Interpolation is used to display component data in the HTML template. For example, if you have a variable name in your component:

                   
                       // Component
                       export class MyComponent {
                         name: string = 'John';
                       }                    
                   
               

   You can display this variable in your template using interpolation:

                   
                       <!-- Template -->
                         <p>Welcome, {{ name }}!</p>
                   
               

   When Angular renders this component, it replaces {{ name }} with the value of the name variable from the component, resulting in the HTML displaying "Welcome, John!".

2. Expressions: Interpolation can handle simple expressions within {{ }}. For instance:

                   
                       // Component
                       export class MyComponent {
                         age: number = 25;
                       }                    
                   
               

   You can perform simple operations:

                   
                       <!-- Template -->
                       <p>Age after 5 years: {{ age + 5 }}</p>
                 
               

   This will display "Age after 5 years: 30".

3. String Concatenation: Interpolation also allows concatenating strings:

                   
                       // Component
                       export class MyComponent {
                         firstName: string = 'John';
                         lastName: string = 'Doe';
                       }                    
                   
               

   In the template:

                   
                       <!-- Template -->
                       <p>{{ 'Full Name: ' + firstName + ' ' + lastName }}</p>
               
               

   This will display "Full Name: John Doe".

Interpolation is a simple and powerful way to bind data from your Angular component to your HTML templates, making it easy to display dynamic content and variables in your web application.

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