break statement works and exits the loop properly but doesn't exit the program

Question

print(f"n before loop is {n}")

while True:
    for i in range(n):
        if n == 20:
            break
        else:
            print(n)
            n = n + 1

Enter n 10
n before loop is 10
10
11
12
13
14
15
16
17
18
19
^CTraceback (most recent call last):
  File "/home/ubuntu/1_5.py", line 5, in <module>
    for i in range(n):
             ^^^^^^^^
KeyboardInterrupt```

As you can see, i had to ctrl+c every time to exit program. It works properly as intended in other programs and exit as it should be. But here in this program it doesn't exit the program but only exits the loop. Thanks for reading my question.

Asked By: ash-ash-noob-noob

||

Source

Answer 1

You’re only breaking out of the for loop currently. You could set a run flag to break out of both loops like this:

n = int(input("Enter n "))
print(f"n before loop is {n}")

run = True
while run:
    for i in range(n):
        if n == 20:
            run = False
            break
        else:
            print(n)
            n = n + 1`

Answered By: jprebys

Answer 2

You do not need the while loop. It will break out of the for-loop when n reaches 20.

Code:

n = int(input("Enter n "))
print(f"n before loop is {n}")


for i in range(n):
    if n == 20:
        break
    else:
        print(n)
        n = n + 1

Output when n starts at 15:

n before loop is 15
15
16
17
18
19

Answered By: ScottC

Answer 3

break command allows you to terminate a loop, but it allows you to break the loop this command is written in(for-loop), so if you want to terminate the outer loop(while-loop) you can use a flag:

n = int(input("Enter n "))
print(f"n before loop is {n}")

end = False
while True:
    for i in range(n):
        if n == 20:
            end = True
            break
        else:
            print(n)
            n = n + 1
 if end:
     break

Answered By: Abdalla Elawady

break statement works and exits the loop properly but doesn't exit the program

Question:

Answers:

Code:

Output when n starts at 15: