{% call "sha1" "foo" %}            {# => 0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33 #}
{% call "sha1" "foo" as fooHash %} {# will create fooHash variable instead of outputting #}

<p>{{ fooHash }}</p> {# => 0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33 #}