Definition: AND is an operation between two bits. If both bits are set then the result is set otherwise the result is clear. This can be shown as below.
A B --- A AND B
0 0 ----- 0
0 1 ----- 0
1 0 ----- 0
1 1 ----- 1
In C, C++ and C# binary AND is represented by a single character &.
In expressions, AND is represented by the double character && as in
if (a==2) && (b==3) { //.. rest of code
Which means if a equals 2 and b equals 3
Glossary:
A B C D E F G H I J K L M N O P Q R S T U V W X Y ZExamples:
OR is often used to combine bytes together.

