> Portal Navigation: > > - Append `.md` to any URL under `https://dev.wix.com/docs/` to get its markdown version. > - Pages are either content pages (article or reference text) or menu pages (a list of links to child pages). > - To get a menu page, truncate any URL to a parent path and append `.md` (e.g. `https://dev.wix.com/docs/sdk.md`, `https://dev.wix.com/docs/sdk/core-modules.md`). > - Top-level index of all portals: https://dev.wix.com/docs/llms.txt > - Full concatenated docs: https://dev.wix.com/docs/llms-full.txt # Resource: Items # Type: WixDataAggregatePipelineExpressions # Action: mod # Link: https://dev.wix.com/docs/sdk/business-solutions/data/items/wix-data-aggregate-pipeline-expressions/mod.md ## Description: Finds the remainder when dividing 1 expression by another. The `mod()` method configures the aggregation pipeline to find the remainder when dividing the first expression by the second expression. ## Schema: ```json Method: mod(first, second) Description: Finds the remainder when dividing 1 expression by another. The `mod()` method configures the aggregation pipeline to find the remainder when dividing the first expression by the second expression. Method parameters: param name: first | type: Expression | description: Expression to divide by `second` to find the remainder. Expression must resolve to a number. param name: second | type: Expression | description: Expression to divide `first` by. Expression must resolve to a non-zero number. Return type: REFERENCE ```