Lecture 3

Question 1

What are the ways of terminating a for loop?

Question 1

What is the output from the following code?
~~~
x = 4
for j in range(x):
print(“Iteration of outer loop”)
for i in range(x):
print(“-> Iteration of inner loop”)
x = 2
~~~

Answer 1

Iteration of outer loop
-> Iteration of inner loop
-> Iteration of inner loop
-> Iteration of inner loop
-> Iteration of inner loop
Iteration of outer loop
-> Iteration of inner loop
-> Iteration of inner loop
Iteration of outer loop
-> Iteration of inner loop
-> Iteration of inner loop
Iteration of outer loop
-> Iteration of inner loop
-> Iteration of inner loop

The number of iterations of for loop is evaluated once, when Python first encounters the for statement.

Neither the number of iterations nor the range of elements is re-evaluated during looping.