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

ashashnoobnoob
January 18, 2023
281 views
2 votes
3 Answers

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.

Answers

- jprebys
- January 18, 2023 at 4:54 pm
- 0 votes
0
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`
```
Login or Signup to reply.

- ScottC
- January 18, 2023 at 4:55 pm
- 0 votes
0
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
```
Login or Signup to reply.

- AbdallaElawady
- January 18, 2023 at 5:02 pm
- 0 votes
0
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
```
Login or Signup to reply.