How to define a variable in SASS?

We can define a variable in sass

• The variable means to store all types of values and data like Boolean, String, numeric, etc.
• This variable value can use after time as per requirement.
• The SASS variable syntax is below.

$variable_name: variable_value; 

• example of SASS variable

$simple: blue;
$primary:5px;
.p{
Background-color:$simple;
}
.h1{
color: $simple;
font-size: $primary;
}