PPA-8

Question

Accept a positive integer \(n\) as input and print the first \(n\) integers on a line separated by a comma.

Hint

Consider the following piece of code:

n = int(input())

for x in range(1, n + 1):
    print(x, end = ',')

For an input of \(5\), this ends up printing 1,2,3,4,5, and the last comma is undesirable. How do we get rid of it? You can use an if-else block:

• If x == n, which is the last number you are printing, then just print(x).
• If x != n, which is any other number in the sequence, then print(x, end = ',')

You have enough information to complete the code.

Solution

Solution-1

n = int(input())

for x in range(1, n + 1):
    if x != n:
        print(x, end = ',')
    else:
        print(x)

Solution-2

Here we stop short of the last number and print it outside the loop.

n = int(input())

for x in range(1, n):
    print(x, end = ',')
print(n)