While loop query

[fesi]

HI there, i need some help understanding this piece of code below, the output is -1 0 1 2 3. I don't understand why is 3 printed. Help would be greatly appreciated, thanks.

n = range(4)
for num in n:
print(num - 1, end = " ")
else:
print(num)

 

[phillip1882]

that is strange behavior. i didn't know you could have an else to a for loop.
and the num variable should only be applicable to the for loop, not the else
and why 3 and not 4? i have no idea

 

[canada_roy]

The first statement gives n the range 0,1,2,3 (4 numbers beginning with 0, not 0 to 4)

The else statement is executed when the loop is finished. The last iteration of the loop is when n=3. The loop returns the 2. When the loop is exited and the else statement is executed, n is still 3, and that is what the last statement prints.