Write a program to generate the sequence: -5,10, -15,20,-25 ..., upto n, where n is an integer input by the user.

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Question

Write a program to generate the sequence: $-5,10$, $-15,20,-25 \ldots .$. upto $\mathrm{n}$, where $\mathrm{n}$ is an integer input by the user.

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Answer

Below is a Python program that generates the sequence -5, 10, -15, 20, -25, ... up to n where n is an integer input by the user:

# Program to generate the sequence -5, 10, -15, 20, -25, ... upto n
n = int(input("Enter a number n: "))

# Initialize variables
term = -5
i = 1

# Generate the sequence
print("Generated sequence:", end=" ")
while abs(term) <= n:
    print(term, end=", ")
    term = -term + (5 * i)
    i += 1

Explanation

  1. The input function is used to accept an integer from the user.

  2. The loop continues until the absolute value of term is less than or equal to n.

  3. The value of term is updated in each iteration:

    • -term flips the sign.

    • 5 * i adds an increment of 5 on each iteration.

Sample Output

Enter a number n: 30
Generated sequence: -5, 10, -15, 20, -25, 30

The sequence will continue to alternate signs and increment its absolute value by 5 on each iteration until the specified condition is met.

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