- Python Basic Programs
- Python Program Examples
- Python Print Hello World
- Python Get Input from User
- Python Add Two Numbers
- Python Add Subtract Multiply Divide
- Python Check Even or Odd
- Python Check Prime or Not
- Python Check Alphabet or Not
- Python Check Vowel or Not
- Python Check Leap Year or Not
- Python Check Reverse equal Original
- Python Check Positive Negative Zero
- Python Check Armstrong or Not
- Python Check Palindrome or Not
- Python Check Perfect Number
- Python Find Reverse of Number
- Python Count Digits in Number
- Python Add Digits of Number
- Sum of First and Last Digits
- Python Product of Mid Digits
- Sum of Squares of Digits
- Python Interchange Digits of Number
- Python Sum of n Numbers
- Python Print ASCII Values
- Python Swap Two Numbers
- Python Swap Two Variables
- Python Fahrenheit to Celsius
- Python Celsius to Fahrenheit
- Python Display Calendar
- Python Days into Years, Weeks
- Python Find Largest of Two Number
- Python Find Largest of Three Number
- Python Print Fibonacci Series
- Python Generate Armstrong Numbers
- Python Make Simple Calculator
- Python Add Binary Numbers
- Python Binary Number Multiplication
- Python Mathematical Programs
- Python Find Sum of Natural Numbers
- Python Find Average of n Numbers
- Python Print Multiplication Table
- Python Print Table using Recursion
- Python Find Average Percentage
- Python Find Grade of Student
- Python Find Square Root of Number
- Python Print Prime Numbers
- Find Numbers Divisible by Number
- Python Find Factors of Number
- Python Find Factorial of a Number
- Python Find HCF & LCM
- Python Kilometres to Miles
- Python Find Area of Square
- Python Find Area of Rectangle
- Python Find Area of Triangle
- Python Find Area of Circle
- Python Find Perimeter of Square
- Python Find Perimeter of Rectangle
- Python Find Perimeter of Triangle
- Python Find Circumference of Circle
- Python Simple Interest
- Python Solve Quadratic Equation
- Python Different Set of Operations
- Python Display Powers of 2
- Python Find nCr & nPr
- Python Pattern Programs
- Python Print Pattern Programs
- Python Print Diamond Pattern
- Python Print Floyd's Triangle
- Python Print Pascal's Triangle
- Python List Programs
- Python Count Even/Odd in List
- Python Positive/Negative in List
- Python Even Numbers in List
- Python Odd Numbers in List
- Python Sum of Elements in List
- Python Sum of Odd/Even Numbers
- Python Element at Even Position
- Python Element at Odd Position
- Python Search Element in List
- Python Largest Number in List
- Python Smallest Number in List
- Python Second Largest in List
- Python Second Smallest in List
- Python Insert Element in List
- Python Delete Element from List
- Python Multiply Numbers in List
- Python Swap Two Elements in List
- Python 1D Array Program
- Python Linear Search
- Python Binary Search
- Python Insertion Sort
- Python Bubble Sort
- Python Selection Sort
- Python Remove Duplicates from List
- Python Reverse a List
- Python Merge Two List
- Python Conversion Programs
- Python Decimal to Binary
- Python Decimal to Octal
- Python Decimal to Hexadecimal
- Python Binary to Decimal
- Python Binary to Octal
- Python Binary to Hexadecimal
- Python Octal to Decimal
- Python Octal to Binary
- Python Octal to Hexadecimal
- Python Hexadecimal to Decimal
- Python Hexadecimal to Binary
- Python Hexadecimal to Octal
- Python Matrix Programs
- Python Add Two Matrices
- Python Subtract Two Matrices
- Python Transpose Matrix
- Python Multiply Matrices
- Python String Programs
- Python Print String
- Python Find Length of String
- Python Compare Two Strings
- Python Copy String
- Python Concatenate String
- Python Reverse a String
- Python Swap Two Strings
- Python Uppercase to Lowercase
- Python Lowercase to Uppercase
- Python Count Character in String
- Python Count Repeated Characters
- Python Count Word in Sentence
- Python Count Each Vowels
- Python Capitalize Character
- Python Capitalize Word in String
- Python Smallest/Largest Word
- Python Remove Spaces from String
- Python Remove Duplicate Character
- Python Remove Vowels from String
- Remove Punctuation from String
- Python Remove Word in String
- Python Remove Duplicate Words
- Replace Blank Spaces with Hyphens
- Replace Vowels with Character
- Python Replace Character in String
- Python Sort String in Alphabetical
- Sort Word in Alphabetical Order
- Python Extract Number from String
- Python Check Anagram Strings
- Python File Programs
- Python Read a File
- Python Write to File
- Python Append Text to File
- Python Copy Files
- Python Merge Two Files
- Python Counts Characters in File
- Python Count Words in File
- Python File Content in Reverse
- Python Lines Contains String
- Python Delete Line from File
- Python Capitalize Word in File
- Python Replace Text in File
- Replace Specific Line in File
- Python Find Size of File
- Python List Files in Directory
- Python Delete Files
- Python Other Programs
- Python Reverse a Tuple
- Python Merge Two Dictionary
- Python Advance Programs
- Python Generate Random Numbers
- Python Print Address of Variable
- Python Print Date and Time
- Python Get IP Address
- Python Shutdown/Restart PC
- Python Tutorial
- Python Tutorial
- Give Online Test
- All Test List
- Python Online Test

« Previous Program Next Program »

This article is created to cover some programs in Python, that find and prints LCM and HCF (GCD) of two numbers entered by user. Here are the list of programs:

- Find LCM of Two Numbers
- Find HCF (GCD) of Two Numbers
- Find LCM and HCF of Two Numbers using Formula

If you don't know the thing used to find LCM or HCF (GCD), then you can refer to any of the following, whatever you required, to get everything about the topic:

**Note - **LCM stands for Least Common __Multiple__. Whereas HCF stands for Highest Common __Factor__.

To find LCM of two numbers in Python, you have to ask from user to enter any two numbers, then find and print the LCM value as shown in
the program given below. The question is, **write a Python program to find LCM of two numbers.** Here is its answer:

print("Enter Two Numbers: ") numOne = int(input()) numTwo = int(input()) if numOne>numTwo: lcm = numOne else: lcm = numTwo while True: if lcm%numOne==0 and lcm%numTwo==0: break else: lcm = lcm + 1 print("\nLCM =", lcm)

Here is the initial output produced by this Python program:

Now supply inputs say **8** as first number, then press `ENTER`

key, again enter a number say **20**
as second number, now press `ENTER`

key to find and print LCM value of these two numbers as shown in the snapshot given below:

The dry run of above program with same user input as provided in sample run, goes like:

- Initial values,
**numOne=8**(entered by user),**numTwo=20**(entered by user) - Now the condition (of
**if**)**numOne>numTwo**or**8>20**evaluates to be true, therefore program flow goes inside this**if**'s body and the value of**numOne**(8) gets initialized to**lcm**. So**lcm=8** - If the condition was evaluated to be false, then program flow goes to
**else**'s body, instead of**if**'s body - Now the condition (of
**while**loop)**True**always evaluates to be true, therefore program flow goes inside the loop - And the first condition of
**if**, that is**lcm%numOne==0**or**8%8==0**evaluates to be true, therefore the second condition also gets evaluated. So the condition**lcm%numTwo==0**or**8%20==0**evaluates to be false, therefore program flow goes to**else**'s body and the value of**lcm**gets incremented by 1. So**lcm=9** - Since the condition of
**while loop**always evaluates to be true, therefore this process continues, until both the condition of**if**evaluates to be true - That is, when both the condition of
**if**evaluates to be true, then program flow goes inside its body and using**break**, the execution of**while loop**gets ended - And after exiting from the loop, I've printed the value of
**lcm**as LCM value of given two numbers - So when the value of
**lcm**becomes equal to**40**, then the condition**lcm%numOne==0**or**40%8==0**or**0==0**evaluates to be true, and the second condition**lcm%numTwo==0**or**40%20==0**or**0==0**also evaluates to be true, therefore program flow goes inside the**if**'s body and using**break**keyword, program flow goes out of the**while**loop - In this way, the LCM of two numbers gets calculated

This is the modified version of previous program. This program uses **end** to skip inserting an automatic
newline using **print()**. The **str()** converts any type of value to a string type. The **try-except**
is used to handle and print error message, when user enters non-integer values.

print("Enter Two Numbers: ", end="") try: nOne = int(input()) try: nTwo = int(input()) if nOne > nTwo: lcm = nOne else: lcm = nTwo while True: if lcm % nOne == 0 and lcm % nTwo == 0: break else: lcm = lcm + 1 print("\nLCM (" + str(nOne) + ", " + str(nTwo)+") = ", lcm) except ValueError: print("\nInvalid Input!") except ValueError: print("\nInvalid Input!")

Here is its sample run with user input, **23** and **4** as two numbers:

This program is created to find and print the value of **HCF** or **GCD** of two numbers entered by user at run-time:

print("Enter Two Numbers: ", end="") no = int(input()) nt = int(input()) if no>nt: hcf = no else: hcf = nt while True: if no%hcf==0 and nt%hcf==0: break else: hcf = hcf - 1 print("\nHCF (" + str(no) + ", " + str(nt) + ") = ", hcf)

Here is its sample run with **10** and **12** as two numbers entered by user:

This program uses formula to find and print LCM and HCF both in a single program:

print("Enter Two Numbers: ", end="") no = int(input()) nt = int(input()) a = no b = nt while b!=0: temp = b b = a%b a = temp hcf = a lcm = int((no*nt)/hcf) print("\nLCM (" + str(no) + ", " + str(nt) + ") = ", lcm) print("HCF (" + str(no) + ", " + str(nt) + ") = ", hcf)

Here is its sample run with two numbers input as **7** and **56**:

« Previous Program Next Program »

© Copyright 2021. All Rights Reserved.