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+# Logic Gates 
+
+## Introduction
+
+Logic gates are the fundamental building blocks in digital electronics.
+
+Logic gates  perform logical operation based on the inputs provided to it and gives a logical output that can be either high(1) or low(0).
+
+Logic gates are used in our day-to-day lives,such as in the architecture of our telephones,laptops,tablets and memory devices.
+
+# Types of Logic Gates
+ There are basically seven main types of logic gates.
+
+## 1. AND GATE
+
+
+### Definition
+The output state of the AND gate will be high(1) if both the input is high(1).
+
+### Boolean Expression
+
+Y = A . B
+The value of y will be True when both the inputs will be True.
+
+### Truth Table
+
+![alt text](images/image-7.png)
+
+### Diagram
+
+![alt text](images/image.png)
+
+### Real Life Example
+An AND gate works like a circuit where two switches must be ON to light a bulb.
+
+## 2. OR GATE 
+
+### Definition 
+The output state of OR gate will be high(1) if any of the input state is high(1).
+
+### Boolean Expression
+
+Y = A + B
+The value of y will be True when one of the inputs will be True.
+
+### Truth Table
+
+![alt text](images/image-8.png)
+
+### Diagram
+![alt text](images/image-1.png)
+
+
+## 3. NOT GATE 
+
+### Definition 
+When the input signal is low(0) the output signal is high(1) and vice-versa.
+
+### Boolean Expression
+
+Y = A' 
+The value of y will be HIGH when A will be low.
+
+### Truth Table
+
+![alt text](images/image-9.png)
+
+
+### Diagram
+
+![alt text](images/image-2.png)
+
+
+
+## 4. NOR GATE
+It is the universal logic gate
+
+### Definition
+The output state of the NOR gate will be high(1) when all  the input are low(0).
+
+### Boolean Expression
+
+Y = (A + B)'
+The value of y will be True when all the inputs are set to 0.
+
+### Truth Table
+
+![alt text](images/image-10.png)
+
+### Diagram
+
+![alt text](images/image-3.png)
+
+
+## 5. NAND GATE 
+
+
+### Definition
+The output state of the NAND gate will be high(1) when either of the input is high(1) or both of its inputs are low(0).
+
+### Boolean Expression
+
+Y = (A . B)'
+
+
+### Truth Table
+
+![alt text](images/image-11.png)
+
+### Diagram
+
+![alt text](images/image-4.png)
+
+
+## 6. XOR GATE 
+
+
+### Definition
+The output state of the XOR gate will be high(1)  if one of them low(0) then the other one will be high(1).
+
+### Boolean Expression
+
+Y = A'B + AB'
+
+
+### Truth Table
+
+![alt text](images/image-12.png)
+
+### Diagram
+
+![alt text](images/image-5.png)
+
+
+## 7. XNOR GATE 
+
+
+### Definition
+The output state of the XNOR gate will be high(1) when both the inputs are high(1) or low(0).
+
+### Boolean Expression
+
+Y = AB + A'B'
+
+
+### Truth Table
+
+![alt text](images/image-13.png)
+
+### Diagram
+
+![alt text](images/image-6.png)
+
+
+
+# Conclusion
+Logic gates are essential components of digital electronics.Understanding these components help students to learn and explore advance topics like flip=flops , counter, register and processor.