# Control Flow Tags

These tags are used to control the flow of logic in Liquid templates. They allow you to create conditions, loops, and manage how content is rendered based on different scenarios. Use these tags to add logic and branching to your templates.

## case

Creates a switch statement to execute a particular block of code when a variable has a specified value. case initializes the switch statement, and when statements define the various conditions.
An optional else statement at the end of the case provides code to execute if none of the conditions are met.

**Input**

```liquid
{% assign handle = "cake" %}
{% case handle %}
  {% when "cake" %}
    This is a cake
  {% when "cookie", "biscuit" %}
    This is a cookie
  {% else %}
    This is not a cake nor a cookie
{% endcase %}
```

**Output**

```text
This is a cake
```

---

## if

Executes a block of code only if a certain condition is `true`.

**Input**

```liquid
{% if product.title == "Awesome Shoes" %}
  These shoes are awesome!
{% endif %}
```

**Output**

```text
These shoes are awesome!
```

You can add more conditions within `if` block with `elsif` or `else`

**Input**

```liquid
{% if false %}
  This won't render...
{% elsif true %}
  ...but this will
{% endif %}
```

**Output**

```text
...but this will
```

---

## liquid

Allows writing multiple tag statements on separate lines
without wrapping each one in {% %} delimiters.

**Input**

```liquid
{%- liquid
  assign greeting = "Hello"
  assign name = "World"
  echo greeting | append: " " | append: name
-%}
```

**Output**

```text
Hello World
```

---

## unless

Executes a block of code only if a certain condition is `false` (the inverse of `if`).

**Input**

```liquid
{% unless product.title == "Awesome Shoes" %}
  These shoes are not awesome!
{% endunless %}
```

**Output**

```text
These shoes are not awesome!
```

You can add more conditions within an `unless` block with `elsif` or `else`.

**Input**

```liquid
{% unless false %}
  This will render...
{% elsif true %}
  ...but this won't
{% endunless %}
```

**Output**

```text
This will render...
```