--- title: "Liquid filters: plus" description: Adds two numbers. api_name: liquid source_url: html: https://shopify.dev/docs/api/liquid/filters/plus md: https://shopify.dev/docs/api/liquid/filters/plus.md --- # plus ```oobleck number | plus: number ``` returns [number](https://shopify.dev/docs/api/liquid/basics#number) Adds two numbers. ```liquid {{ 2 | plus: 2 }} ``` ##### Code ``` {{ 2 | plus: 2 }} ``` ## Output ```html 4 ```