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In this tutorial, we are going to learn how to calculate the factorial of a given number, and also, we are going to find the number of trailing zeroes in that number.
Now let's see what a&nbsp;Factorial&nbsp;is. A&nbsp;factorial&nbsp;is a function that multiplies a number by every number below it. For example 7!= 7*6*5*4*3*2*1=5040.
Now to generate the factorial of a given number, we are going to be using the recursive approach because it is easy. We will create a class as factorial()&nbsp;and put a recursive function there to calculate the factorial.
Now to find the number of trailing zeroes of that factorial, we will be using a while loop, where we will count the numbers and then return the trailing zeroes of that factorial number. For better understanding, watch the video.&nbsp;
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<pre class="language-python"><code>def factorial(number):
	if number==0 or number==1:
		return 1
	else:
		return number * factorial(number-1)

def factorialTrailingZeroes(number):
	#fac = factorial(number)
	#print(fac)
	count = 0
	i = 5
	while (number//i !=0):
		count+= int(number/i)
		i = i*5
	return count
	#while (fac%10 ==0):
		#count = count+1
		#fac = fac/10
	#return count 

if __name__ == '__main__':
	number = int(input("Enter a number: \n"))
	#fac = factorial(number)
	#print(f'The factorial is {fac}')
	print(factorialTrailingZeroes(number))</code></pre>