{if true}
It's true
{/if}
{if 2 < 1}False{/if}
{if 1 < 2}True{/if}
{if 1 < 2}{3 + 4}{/if}

{if true}Hello{else}World{/if}
{if false}Hi{else}Earth{/if}

{if false}First{elseif true}second{/if}
{if false}first{elseif false}second{/if}