# Program to Find square of an 8-bit number

Q. Write an 8085 program and draw a flowchart to Find the square of an 8-bit number.(8085 Microprocessor Program)

Flowchart/Algorithm Program

 Address Mnemonics Operand Opcode Comments 2000 LXI H, 3000H 21 Load H-L pair with address 3000H. 2001 00 2002 30 2003 MOV B, M 46 Move the operand from memory to reg. B. 2004 MOV C, M 4E Move the same number from reg. B to reg. C. 2005 MVI A, 00H 3E Initialize accumulator with 00H. 2006 00 2007 ADD B 80 Add B with A. 2008 DCR C 0D Decrement reg. C (counter). 2009 JNZ 2007H C2 Jump back to address 2007H if C ≠ 0. 200A 07 200B 20 200C INX H 23 Increment H-L pair 200D MOV M, A 77 Move the result from accumulator to memory. 200E HLT 76 Halt

Output

Before Execution:

3000H: 03H

After Execution:

3001H: 09H

Program Explanation

1. This program finds the square of an 8-bit number stored in memory location 3000H.
2. The square of a number is found by multiplying it by itself.
3. Therefore, the number is added to itself and is also used as a counter.
4. Let us assume that the operands stored at memory location 3000H is 03H.
5. Then, by using successive addition method, we get 03H + 03H + 03H = 09H.
6. Initially, H-L pair is loaded with the address of the operand.
7. The operand is moved to register B from memory location 3000H and then it is copied to register C.
8. Accumulator is initialized to 00H.
9. Register B is added to the accumulator and the result is stored in the accumulator.
10. Register C (counter) is decremented by 1.
11. Then, the counter is checked for zero. If it hasn’t become zero yet, then register B is again added to the accumulator, and the counter is again checked for zero.
12. If counter becomes zero, then H-L pair is incremented and the result is moved from the accumulator to memory location 3001H.

### 1 thought on “Program to Find square of an 8-bit number”

1. An alp to find the square of number using successive addition

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