Angular function toJson used to serialize input into a JSON formatted string.
Syntax:

angular.toJson(obj, pretty);
Arguments:

obj: Input to be serialized into JSON.
pretty: It is optional parameter. It is boolean / number type. If it is set to true, the JSON output will contains white-space and newline character. if it is set to an integer, the JSON output will contains many spaces per indentation.
Example:
  1. var mySource = [
  2. {
  3. name: 'Jignesh Trivedi',
  4. age: '31'
  5. },
  6. {
  7. name: 'Tejas Trivedi',
  8. age: '33'
  9. }]
  10. var data = angular.toJson(mySource);
Output:
  1. [{
  2. "name": "Jignesh Trivedi",
  3. "age": "31"
  4. },
  5. {
  6. "name": "Tejas Trivedi",
  7. "age": "33"
  8. }]