1. The
symbol which represent an element in a Boolean Algebra is known as variable.
For example, A is a variable which can have the values either 0 [or] 1.
2. A
complement of a variable is represented by ‘bar’ over the letter i.e. A`.
Sometimes, we can also represent the complement with ‘prime ‘ symbol
i.e. A`.
3. AND gate is represented by ‘∙’
operator between the variables.
4. OR
gate is represented by ‘+’ operator between the variables.
5. 0+A=A [or] A+0=A
6. 1+A=1 [or] A+1=1
7. A+A=A
8. A+A`=1 [or]
A`+A=1
9. 0∙A=0 [or] A∙0=0
10. 1∙A=A [or] A∙1=A
11. A∙A=A
12. A∙A`=0 [or]
A`∙A=0
13. A``=A.