Page 90 - KEC Khaitan C8 Flipbook
P. 90
B1
ITERATION IN PYTHON CHAPTER
Learning Outcomes 95%
The student will be able to:
understand the concept and syntax of a for loop.
understand the concept and syntax of a while loop.
apply jump statements (such as break, continue, and return) to alter the normal flow of program
execution.
As you know, a computer program is a set of instructions given to the computer to perform
a specific task. These individual instructions are known as statements. All the statements are
executed sequentially, one after the other, as they appear in a program. However, in some
situations, we have to change the order of execution of the program based on certain conditions.
In such situations, we use control statements to control or change the flow of execution.
ITERATIVE STATEMENTS
Iterative statements refer to the statements that are used to repeat a task based on a given
condition. These statements are also known as looping statements. An iteration means one pass
of a loop.
Python provides the following iterative statements:
(i) For loop (ii) While loop
THE for LOOP
The for loop is a type of iterative statement that allows the user to repeat a set of statements
multiple times until a given condition is falsified. The for loop is commonly used when the number
of iterations is known in advance or when iterating over a sequence, such as a list, string, tuple,
or a range."
The syntax of for loop is as follows:
for <counter variable> in range(start, stop, step_size):
statements
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