if​

{{#if condition }}
  content
{{/if}}

{{#if product.price '>' product.compare_at_price }}
  I am a regular product.
{{/if}}

{{#if condition }}
  content
{{else}}
  content
{{/if}}

{{#if product.type == 'Red' }}
  This is a red option!
{{else if product.type == 'Yellow' }}
  This is a yellow option!
{{/if}}

{{#if product.available }}
  This product is available!
{{else}}
  This product is sold out!
{{/if}}

{{#if (lowercase product.type) == 'red' }}
  This is a red option!
{{/if}}

{{#if product.type == 'yellow' or product.price >= 10 and product.available }}
  This is a available yellow type product, or greater than 100 product!
{{/if}}