Expressions

Expressions are used in the following statements: if, for, set, while.

Method Call

You can use Objective-C [] method calls.

Array

You can specify an array of expressions with @() like @( 1, "A")

Number

You can use an integer number like 1,2,3 or floating point numbers like 0.1, 0.2, 0.3.

String

You can use strings like "foo" or @"foo".

Comparison

The available comparion operators are:

Operator	Alternative Form	Descriptor
eq	'=='	Equality comparison
ne	'!='	Inequality comparison
lt	'<'	Ascending comparison
le	'<='	Ascending or equality comparison
gt	'>'	Descending comparison
ge	'>='	Descending or equality comparison
?:		The ternary operator

Example 1

{% if 1 < 2 %}
t
{% else %}
f
{% endif %}

Output:

t

Example 2

{% if 1 gt 2 %}
t
{% else %}
f
{% endif %}

Output:

f

Example 3

{% if 1 == 2 %}
t
{% else %}
f
{% endif %}

Output:

f

Example 4

{% if 1 ne 2 %}
t
{% else %}
f
{% endif %}

Output:

t

Example 5

{% if 1 == 1 ? NO : YES %}
t
{% else %}
f
{% endif %}

Output:

f