Python Exercise: Calculate the factorial of a number
Python Functions: Exercise-5 with Solution
Write a Python function to calculate the factorial of a number (a non-negative integer). The function accepts the number as an argument.
Sample Solution-1:
Python Code:
def factorial(n):
if n == 0:
return 1
else:
return n * factorial(n-1)
n=int(input("Input a number to compute the factiorial : "))
print(factorial(n))
Sample Output:
Input a number to compute the factiorial : 4 24
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Sample Solution-2:
- Use recursion.
- If n is less than or equal to 1, return 1.
- Otherwise, return the product of n and the factorial of n - 1.
- Display an error message if n is a negative or a floating point number.
Python Code:
def factorial(n):
if not ((n >= 0) and (n % 1 == 0)):
return("Number can't be negative or floating point!")
return 1 if n == 0 else n * factorial(n - 1)
print("\nFactorial of 5: ",factorial(5))
print("\nFactorial of -12: ",factorial(-12))
print("\nFactorial of 1.22: ",factorial(1.22))
print("\nFactorial of 100: ",factorial(100))
Sample Output:
Factorial of 5: 120 Factorial of -12: Number can't be negative or floating point! Factorial of 1.22: Number can't be negative or floating point! Factorial of 100: 93326215443944152681699238856266700490715968264381621468592963895217599993229915608941463976156518286253697920827223758251185210916864000000000000000000000000
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Python Code Editor:
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Python: Tips of the Day
Decapitalizes the first letter of a string:
Example:
def tips_decapitalize(s, upper_rest=False): return s[:1].lower() + (s[1:].upper() if upper_rest else s[1:]) print(tips_decapitalize('PythonTips')) print(tips_decapitalize('PythonTips', True))
Output:
pythonTips pYTHONTIPS
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