Let us take a look t methods that we have to find the LCM using functions

## Method 1: Using the divide operator

def calc_LCM(x, y): if x > y: greater = x else: greater = y while(True): if((greater % x == 0) and (greater % y == 0)): lcm = greater break greater += 1 return lcm num1 = int(input("Enter the first number: ")) num2 = int(input("Enter the second number: ")) print("The L.C.M. is", calc_LCM(num1, num2))

**Output:**

```
Enter the first number: 64
Enter the second number: 56
The L.C.M. is 448
```

**Explanation:**

Here we compared the value passed to the function i.e x and y if x > y then we assign the value of x in a **greater **variable and the same goes for **y**. Now we used the while loop and check the condition**(greater % x == 0) and (greater % y == 0)**, if this satisfies then and then we assign the value of greater to the lcm variable or else we increment greater and continue on with the loop.

## Method 2: Using reduce() function

def check_LCM(a, b): if a > b: greater = a else: greater = b while True: if greater % a == 0 and greater % b == 0: lcm = greater break greater += 1 return lcm def calc_LCM(your_list): return reduce(lambda x, y: check_LCM(x, y), your_list) ans = calc_LCM([1, 2, 3, 4, 5, 6, 7, 8, 9]) print("The LCM is: ",ans)

## Method 3: Using recursion

def calc_LCM(n, m): if m == 0: return n return calc_LCM(m, n % m) A = [100, 205, 12 , 15, 5, 19] lcm = 1 for i in A: lcm = lcm * i // calc_LCM(lcm, i) print("The LCM is: ", lcm)

**Explanation:**

Here we used a for loop, wherein we did the floor division between the expression calc_LCM(lcm, i)and the output of **calc_LCM(lcm, i)**. This will again call the function and in the second iteration the value inside the lcm variable will be the round-off whole number computed by **lcm * i // calc_LCM(lcm, i)**

## Method 4: Using NumPy

import numpy as np result = np.lcm(120, 200)

These above are some of the methods in order to compute the LCM. That’s all for this article, we will be back with another problem-solving article.