Merge pull request #20 from roshaan005/operators_lesson_improvement

improvement:operators.md

Author: Utkarsh1504

lessons/operators.md

@@ -70,8 +70,9 @@ Relational operators are used to compare the values of two operands. They are us
 
 Logical operators are used to perform logical operations. They are used to perform the following operations:
 
-- `&&`: AND used to perform logical AND operation. It gives true if both the operands have true value.
-- `||`: OR used to perform logical OR operation. It gives true if either of the operands have true value.
+- `&&` and `&`: Java unlike many other languages has two AND operators to perform logical AND operation. It returns true if both the operands (being compared) have a truthy value. Even though both the `&` and `&&` operators perform the same AND operation; the `&&` operator is a logical operator and it  can improve the efficiency of your code since it evaluates the second expression only if the first expression is true unlike the bitwise `&` operator which evaluates the second expression nonetheless. 
+
+- `||` and `|`: OR is used to perform logical OR operation. It returns true if either of the operands have a truthy value. The difference between `|` and `||` is that the `|` operator is a bitwise operator and it compares each operand bitwise whereas the `||` operator is the logical OR operator. It operates on both the operands and returns true if either of the operands have a truthy value. 
 - `!`: NOT used to perform logical NOT operation. It gives true if the operand has false value.
 
 let's see an example: