Check for odd or even in array in liquid - jekyll

Question

If there is any way to check for odd or even in array.size, for example?
{% if.collections.size == EVEN %}
{% endif %}

Answer 1

Refer to the Maths Modulo filter:
http://docs.shopify.com/themes/liquid-basics/output#modulo
{% assign value = collections.size | modulo:2 %}
{% if value == 0 %}
even
{% else %}
odd
{% endif %}
Or if you'd prefer a one liner:
{{ collections.size | modulo:2 | plus:1 | pluralize:'even','odd' }}

Answer 2

after some experiments, I found the solution, maybe for anyone will be helpfull
{% assign even = false %}
{% for collection in collections %}
{% capture u %}{% cycle 'odd', 'even' %}{% endcapture %}
{% if u == 'even' %}
{% assign even = true %}
{{u}}
{% endif %}
{% endfor %}
{% if even == true %}
collection-even
{% endif %}

Answer 3

int arr[20] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
cout << "The Even no are : \n";
for (int i = 1; i <= 10; i++) // for start for only i....(even nos)
{
if (i % 2 == 0)
{
cout << i;
cout << " ";
}
}
cout << "\nThe Odd no are : \n";
for (int j = 1; j <= 10; j++) // for start for only j....(odd nos)
{
if (j % 2 != 0)
{
cout << j;
cout << " ";
}
}