Python program to implement Full Adder

Prerequisite : Full Adder in Digital Logic
Given three inputs of Full Adder A, B,C-IN. The task is to implement the Full Adder circuit and Print output i.e sum and C-Out of three inputs.

Full Adder : A Full Adder is a logical circuit that performs an addition operation on three one-bit binary numbers. The full adder produces a sum of the three inputs and carry value.
 

Logical Expression :

SUM  =  C-IN  XOR  ( A XOR B )
C-0UT =  A B + B C-IN + A C-IN

Truth Table : 

Examples :

Input : 0 1 1
Output: Sum = 0, C-Out = 1

According to logical expression Sum= C-IN XOR (A XOR B )  i.e 1 XOR (0 XOR 1) =0 , C-Out= A B + B C-IN + A C-IN  i.e.,  0 AND 1 + 1 AND 1 + 0 AND 1 = 1 

Input : 1 0 0
Output: Sum = 1,  C-Out = 0

Approach :

• We take three inputs A ,B and C-in .
• Applying C-IN XOR (A XOR B ) gives the value of sum
• Applying  A B + B C-IN + A C-IN gives the value of C-Out

Below is the implementation :

# python program to implement full adder

# Function to print sum and C-Out
def getResult(A, B, C):

	# Calculating value of sum
	Sum = C ^ (A ^ B)
	
	# Calculating value of C-Out
	C_Out = ( C &( not ( A ^ B ))) | (not A) & B 
 
    # printing the values
	print("Sum = ", Sum)
	print("C-Out = ", C_Out)


# Driver code
A = 1
B = 0
C = 0
# passing three inputs of fulladder as arguments to get result function
getResult(A, B, C)

Output :

Sum =  1
C-Out =  0

vikkycirus

Follow

Improve

Article Tags :

• Digital Logic
• Technical Scripter