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create a Python script with a recursive function to display the sum of the first n integers, where n is entered by the user.

Question

Create a Python script with a recursive function to display the sum of the first n integers, where n is entered by the user.

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Solution

Sure, here is a step-by-step guide to create a Python script with a recursive function to display the sum of the first n integers:

Step 1: First, we need to define our recursive function. In Python, we define a function using the def keyword. Let's call our function sum_of_integers.

def sum_of_integers(n):

Step 2: Every recursive function needs a base case, i.e., a condition under which it will stop calling itself. In our case, the base case will be when n is 0. If n is 0, the function should return 0.

def sum_of_integers(n):
    if n == 0:
        return 0

Step 3: Next, we need to define the recursive case. In our case, the sum of the first n integers is n plus the sum of the first n-1 integers. We can express this in Python as follows:

def sum_of_integers(n):
    if n == 0:
        return 0
    else:
        return n + sum_of_integers(n-1)

Step 4: Now, we need to get the input from the user. We can use the input function in Python for this. The input function returns a string, so we need to convert this to an integer using the int function.

n = int(input("Enter a number: "))

Step 5: Finally, we need to call our function with the user's input and print the result.

print(sum_of_integers(n))

Here is the complete script:

def sum_of_integers(n):
    if n == 0:
        return 0
    else:
        return n + sum_of_integers(n-1)

n = int(input("Enter a number: "))
print(sum_of_integers(n))

This script will ask the user to enter a number, calculate the sum of the first n integers using a recursive function, and then print the result.

This problem has been solved

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