What are expressions in Angular?

Angular expressionsare unit of code which resolves to value. This code is written inside curly braces “{“.
Below are some examples of angular expressions:-
The below expression adds two constant values.

{{1+1}}

The below expression multiplies quantity and cost to get the total value.

The value total cost is {{ quantity * cost }}

The below expression displays a controller scoped variable.

<div ng-controller="CustomerVM">
The value of Customer code is {{CustomerCode}} 
</div>

The value of Customer code is {{CustomerCode}}