if

{{#if condition }}
  expression
{{/if}}

{{#if product.price > 30 }}
    product price more than 30
{{/if}}

{{#if product.price < 30 }}
    product price less than 30
{{#else if product.price > 30 /}}
    product price more than 30
{{/if}}

{{#if product.price < 30 }}
    product price less than 30
{{#else/}}
    product price more than 30
{{/if}}