Here are five Python programs to find the factorial of a given number using different approaches:
### 1. Using Iterative Approach:
```python
# Program 1: Finding factorial using iterative approach
def factorial_iterative(n):
result = 1
for i in range(1, n + 1):
result *= i
return result
number = 5
print(f"The factorial of {number} is:", factorial_iterative(number))
```
### 2. Using Recursive Approach:
```python
# Program 2: Finding factorial using recursive approach
def factorial_recursive(n):
if n == 0:
return 1
else:
return n * factorial_recursive(n - 1)
number = 5
print(f"The factorial of {number} is:", factorial_recursive(number))
```
### 3. Using Math Module:
```python
# Program 3: Finding factorial using math module
import math
number = 5
factorial = math.factorial(number)
print(f"The factorial of {number} is:", factorial)
```
### 4. Using Reduce Function:
```python
# Program 4: Finding factorial using reduce function
from functools import reduce
number = 5
factorial = reduce(lambda x, y: x * y, range(1, number + 1))
print(f"The factorial of {number} is:", factorial)
```
### 5. Using While Loop:
```python
# Program 5: Finding factorial using while loop
def factorial_while(n):
result = 1
while n > 0:
result *= n
n -= 1
return result
number = 5
print(f"The factorial of {number} is:", factorial_while(number))
```
Each of these programs calculates the factorial of a given number using a different approach - iterative, recursive, using the math module, with the reduce function, and with a while loop. Feel free to run these programs with different values to compute the factorial for any desired number.
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