Using Expressions, AngularJS binds data to HTML at the location wherever expression is mentioned on web page. It can be written inside double braces {{expression}}. It can also be written in different way like ng-bind=”expression”. ng-bind maps innerHTML to the value of expression.
Let’s take an example of a HTML paragraph with expression which are equivalent:
{{ 5+5 }}
OR
As already mentioned, AngularJS resolves expression and return the result exactly where expression is written. They can contain literals, operators and variables.
Example # 1
Output:
Sum of 10 and 20 is 30
Mentioning ng-app is important otherwise expression will not be calculated and output will be printed as
Sum of 10 and 20 is {{ 10 + 20 }}
Example # 2
Output:
Dear Satyendra Mishra,
Mature amount of your deposit amount 100 on simple rate of interest 8% for 2 years will be 16.
AngularJS Objects
Example # 3
You can also create objects called as AngularJS Objects
Output:
Dear Satyendra Mishra,
Mature amount of your deposit amount 100 on simple rate of interest 8% for 2 years will be 16.
AngularJS Arrays
Example # 4
AngularJS Arrays are initializes using ng-init in the format provided in below example. There is also a magic on select control, if you change selected item last statement of this example changes.
Output:
Additional Notes
- AngularJS expressions do not support conditionals, loops, and exceptions, while JavaScript expressions do.
- AngularJS expressions support filters, while JavaScript expressions do not.
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Satyendra
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