# Advanced usage

## Nested helpers

Nested helpers refers to having a helper inside another, this enables you to use multiple helpers on a token. Nested helpers can be used to address requirements such as “*capitalizing the number converted to words*”, “*sorting comma-separated employee names*” and “*applying discount by percentage on invoice total*”.

Example 1: 

`{{capitalize (number_to_words amount suffix="dollars" decimal_suffix="cents")}}`

| Input   | Output                                                  |
| ------- | ------------------------------------------------------- |
| 800.658 | Eight hundred dollars six hundred and fifty-eight cents |

Example 2: 

`{{divide (subtract a b) c}}`

| Input                                                     | Output |
| --------------------------------------------------------- | ------ |
| <p>a         b           c</p><p>50       10        5</p> | 8      |

Note that nested helpers should be written inside the parenthesis `()` and not inside curly braces `{{}}`.


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