Hello Readers,
This tutorial will guide you about 'How to use twig syntax in Drupal 8'. These basics of twig syntax will help you to understand:

1. How to print value

2. How to use it with control statement like if, else 

3. How to comment the line in twig template.

Printing variables
Use this syntax  {{ }} to print a variable in twig.
for eg:

//This syntax is used to print out the result of expression like

{{ page.primary_menu }}

Control statements:  
Use curly braces with percentile like {% … %} for logic statement or assignment

for eg:

{% if page.footer1 %}
<div>

    {{ page.primary_menu }}

</div>
{% else %}

<div>
        {{ page.custom_menu }}
</div>

{% endif %}

Comments:
Use this syntax # … #} to comment the lines or blocks.

for eg:

{#
     <header id="header" class="header">
        <h1 class="logo"> {{ page.header }} </h1>
    </header>
#}

Debugging variables:
dump() function is used to debugging variables. eg: {{ dump(page) }}