Page 315 - Computer Science V2.0 Class 11

07 continue
08 P = P * num
09 print('The Product is : ', P)

Sample Output:
>>> Enter a number : 4
>>> Enter a number : -9
>>> Enter a number : 5
>>> Enter a number : 0
ZERO will not be multiplied
>>> Enter a number : -3
The Product is : 540
In program 11.9, if the user enters 0, the continue statement skips the rest of the loop statements and causes the
next iteration of the loop without executing the statement, P = P * num.

11.6 Nested Loops

When a loop appears within another loop, it is called a nested loop. An inner loop is part of the body of the outer loop.
The inner loop is executed in each iteration of the outer loop. Nesting may be continued up to any level. The following
examples will illustrate the use of nested loops.

11.6.1 Understanding Nested Loops

Let us examine the following code snippet:
01 for i in range(1,3):
02 print('In the outer loop, i:', i)
03 for j in range(1,4):
04 print(' In the Inner loop (i,j)', (i,j))
In the above code snippet, there are two loops involving the for statement. We call the first loop the outer loop
and the second loop the inner loop. Accordingly, the first for statement is referred to as the outer for statement,
and the second for statement is referred to as the inner for statement. The control variable i in the outer for loop
takes values in the range(1,3), i.e., 1 and 2. For each value of i, the following two statements form the body of the
for-loop. As the second statement in the body is itself a for statement, its body is executed for each value of the
control variable j in range(1,4), i.e., 1, 2, 3. Thus, we get the following output:
In the outer loop, i: 1
In the Inner loop (i,j) (1, 1)

In the Inner loop (i,j) (1, 2)
In the Inner loop (i,j) (1, 3)

In the outer loop, i: 2
In the Inner loop (i,j) (2, 1)
In the Inner loop (i,j) (2, 2)
In the Inner loop (i,j) (2, 3)

11.6.2 Multiplication Tables

Students in elementary classes are often required to memorise the multiplication tables. Suppose you need to help your
sister with memorising the multiplication tables. To help her, you need to know up to which number (upperLimit)
she needs the multiplication tables.

Looping in Python 301