Homework:

Write a MATLAB script to calculate the sum of the first $N$ positive integers, where $N$ is provided by the user.

Implement the solution using both for and while loops in the same script.

Ensure your script handles non$-$positive input values appropriately by displaying an error message and asking the user to input a positive integer.

Hints:

Use the input function to get user input.

Utilize a for loop to iterate from $1$ to $N$ and calculate the sum.

Employ a while loop to validate user input for $N.$