---
type: "fhirpath-operator"
title: "FHIRPath Operator: and (and)"
operator: "and"
category: "Boolean Logic"
section: "6.5.1"
source: "fhirpath/operations.json"
---
# FHIRPath Operator: and (and)
Returns `true` if both operands evaluate to `true`, `false` if either operand evaluates to `false`, and the empty collection (`{ }`) otherwise.

|and |true |false |empty |
| - | - | - | - |
|**true** |`true` |`false` |empty (`{ }`) |
|**false** |`false` |`false` |`false` |
|**empty** |empty (`{ }`) |`false` |empty (`{ }`) |
{:.grid}
## Summary
- **Category**: Boolean Logic
- **Section**: `6.5.1`
- **Left Argument**: `Boolean`
- **Right Argument**: `Boolean`
- **Return Type**: `Boolean`
- **Empty Input Result**: `empty`
- **Errors on Multiple Input**: `false`
## Description
Returns `true` if both operands evaluate to `true`, `false` if either operand evaluates to `false`, and empty collection otherwise. Uses three-valued logic to propagate empty operands.
## Type Mapping
- `Boolean-Boolean`