How to print factorial of a number in Python

In this python tutorial, you will learn how to print factorial of a number in Python and the Python program to print factorial of a number, also we will check:

• Python program to print factorial of a number
• Python program to print factorial of a number using function
• Python program to print factorial of a number using for loop
• Python program to find factorial of a number using recursion
• Python program to print factorial of a number by getting input from a user
• Python program to find factorial of a number using while loop
• Python program to print factorial of a number without recursion
• Factorial program in python using if-else
• Python program to print factorial of number 4
• Python program to print factorial of number 10

Print factorial of a number in Python

Let’s see python program to print factorial of a number.

• Firstly, the number whose factorial is to be found is stored in Num.
• Declare and initialize the factorial variable to 1.
• We will use an if-else statement to check whether the number is negative, zero, or positive.
• The for loop and range() function is used if the number is positive to calculate the factorial of a number.
• At last, print is used to get the factorial of a number.

Example:

Num = 5
Factorial = 1
if Num < 0:
    print("Factorial does not exist for negative numbers")
elif Num == 0:
    print("The factorial of 0 is 1")
else:
    for i in range(1, Num + 1):
        Factorial = Factorial * i
    print("The factorial of",Num,"is",Factorial)

We can see that the factorial of a number is 120 in the output. You can refer to the below screenshot for the output.

The above code, we can use to print factorial of a number in Python.

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Python program to print factorial of a number using function

Now, we will see python program to print factorial of a number using function.

• In this example, we have defined the function as factorial(num).
• To find the factorial we have used a single line if-else statement and also we have assigned the number as 6 for whose factorial is to be found.
• At last, print is used to get the factorial of a number.

Example:

def factorial(num):
    return 1 if (num==1 or num==0) else num * factorial(num-1);
number = 6
print("The factorial of",number,"is",factorial(number))

We can see that the factorial of a number is 720 in the output. You can refer to the below screenshot for the output.

This is how to print factorial of a number using function in Python.

Python program to print factorial of a number using for loop

Here, we will see python program to print factorial of a number using for loop

• Firstly, we will take the input from the user whose factorial is to be found.
• Declare and initialize the Fact variable to 1.
• The for loop and range() function is used to calculate the factorial of a number.
• At last, print is used to get the factorial of a number.

Example:

num = int(input("Enter a number:"))
Fact = 1
for i in range(1, num + 1):
    Fact = Fact * i
print("The Factorial of",num,"is",Fact)

We can see that the factorial of a number is 24 in the output. You can refer to the below screenshot for the output.

The above code, we can use to print factorial of a number using for loop in Python.

• Python For Loop with Examples
• Python While Loop Example

Python program to find factorial of a number using recursion

Now, we will see python program to find factorial of a number using recursion.

• Here, we will use recursion to find the factorial of a number.
• In this example, we have defined the function as recursion_factorial(n)
• We will store the value in number. We will use an if-else statement to check whether the number is negative, zero, or positive.
• The number is passed to the recursion_factorial() function to compute the factorial of the number.

Example:

def recursion_factorial(n):
   if n == 1:
       return n
   else:
       return n*recursion_factorial(n-1)
number = 8
if number < 0:
   print("Factorial does not exist for negative numbers")
elif number == 0:
   print("The factorial of 0 is 1")
else:
   print("The factorial of", number, "is", recursion_factorial(number))

We can see that the factorial of a number is 40320 in the output. You can refer to the below screenshot for the output.

The above code is to find factorial of a number using recursion in Python.

Python program to print factorial of a number by getting input from a user

Let see python program to print factorial of a number by getting input from a user

• Firstly, we will take the input from the user whose factorial is to be found.
• Declare and initialize the fact variable to 1.
• We will use an if-else statement to check whether the number is negative, zero, or positive.
• The for loop and range() function is used if the number is positive to calculate the factorial of a number.
• At last, print is used to get the factorial of a number.

Example:

num = int(input("Enter a number:"))
fact = 1
if num < 0:
    print("Factorial does not exist for negative numbers")
elif num == 0:
    print("The factorial of 0 is 1")
else:
    for i in range(1,num+1):
        fact = fact * i
print("The Factorial of",num,"is",fact)

We can see that the factorial of a number is 5040 in the output. You can refer to the below screenshot for the output.

This is the Python program to print factorial of a number by getting input from a user.

Python program to find factorial of a number using while loop

Here, we will see python program to find factorial of a number using while loop.

• Firstly, we will take the input from the user whose factorial is to be found.
• Declare and initialize the fact variable to 1.
• We will use an if-else statement to check whether the number is negative, zero, or positive.
• A while loop is used to multiply the number to find the factorial in a continuing process.
• The process continues until the value of the number is greater than zero.
• At last, print is used to get the factorial of a number.

Example:

num=int(input("Enter a number to find factorial: "))
fact=1;
if num<0:
   print("Factorial does not defined for negative integer");
elif(num==0):
    print("The factorial of 0 is 1");
else:
  while(num>0):
        fact = fact*num
        num=num-1
print("Factorial of the given number is: ",fact)

We can see that the factorial of a number is 120 in the output. You can refer to the below screenshot for the output.

The above code, we can use to find factorial of a number using while loop in Python.

Python program to print factorial of a number without recursion

Here, we will see python program to print factorial of a number without recursion.

• Firstly, we will take the input from the user whose factorial is to be found.
• Declare and initialize the fact variable to 1.
• A while loop is used to multiply the number to find the factorial in a continuing process.
• The process continues until the value of the number is greater than zero.
• At last, print is used to get the factorial of a number.

Example:

num = int(input("Enter number:"))
Factorial = 1
while(num>0):
    Factorial=Factorial*num
    num=num-1
print("The factorial of entered number is:",Factorial)

We can see that the factorial of a number is 3628800 in the output. You can refer to the below screenshot for the output.

The above code is to print factorial of a number without recursion in Python.

Factorial program in python using if-else

Now, we will see factorial program in python using if-else

• Firstly, we will take the input from the user whose factorial is to be found.
• Declare and initialize the fact variable to 1.
• We will use an if-else statement to check whether the number is negative, zero, or positive.
• The for loop and range() function is used if the number is positive to calculate the factorial of a number.
• At last, print is used to get the factorial of a number.

Example:

number = int(input("Enter a number: "))  
fact = 1  
if number < 0:  
   print("Factorial does not exist for negative numbers")  
elif number == 0:  
   print("The factorial of 0 is 1")  
else:  
   for i in range(1,number + 1):  
       fact = fact*i  
   print("The factorial of",number,"is",fact)

We can see that the factorial of a number is 40320 in the output. You can refer to the below screenshot for the output.

This is the Factorial program in python using if-else.

Python program to print factorial of number 4

Let see python program to print factorial of number 4.

• Firstly, we will take the input from the user whose factorial is to be found.
• Declare and initialize the Fact variable to 1.
• The for loop and range() function is used to calculate the factorial of a number.
• At last, print is used to get the factorial of a number.

Example:

number = int(input(" Please enter any Number to find factorial : "))
fact = 1
for i in range(1, number + 1):
    fact = fact * i
print("The factorial of",number,"is",fact)

We can see that the factorial of a number is 24 in the output. You can refer to the below screenshot for the output

This is code to print factorial of number 4 in Python.

Python program to print factorial of number 10

Now, we will see python program to print factorial of number 10.

• Firstly, we will take the input from the user whose factorial is to be found.
• Declare and initialize the Fact variable to 1.
• The for loop and range() function is used to calculate the factorial of a number.
• At last, print is used to get the factorial of a number.

Example:

number = 10
fact = 1
for i in range(1, number + 1):
    fact = fact * i
print("The factorial of",number,"is",fact)

We can see that the factorial of a number is 3628800 in the output. You can refer to the below screenshot for the output

This is the Python code to print factorial of number 10.

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• How to swap two numbers in Python
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• How to subtract two numbers in Python
• How to divide two numbers in Python
• How to add two variables in Python

In this Python tutorial, we have learned about the Python programs to print factorial of a number. Also, we covered these below topics:

• Python program to print factorial of a number
• Python program to print factorial of a number using function
• Python program to print factorial of a number using for loop
• Python program to find factorial of a number using recursion
• Python program to print factorial of a number by getting input from a user
• Python program to find factorial of a number using while loop
• Python program to print factorial of a number without recursion
• Factorial program in python using if-else
• Python program to print factorial of number 4
• Python program to print factorial of number 10