what is the between statement in sql code example

Example 1: between in sql

(Between) operator same as  ">= <="
For example: 
Select * From Employees Where salary Between 4000 AND 6000;

Example 2: between keyword in sql

Select * From employees
Where salary >= 4000
And salary  <= 6000;

We can also use between

Select * From employees
Where salary BETWEEN 4000 AND 6000;