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09 LOOPS IN PYTHON
to learn about:
The for Statement The while Statement The Infinite Loop
The Jump Statements Some More Programs
Sometimes, you need to repeat a task multiple times or you may need to repeat the task either a
certain number of times or until a condition is satisfied. In Python, the statements that are used
to repeat a set of instructions are called iterative or looping statements. Looping statements are
very useful and necessary for developing applications.
Python provides two types of looping statements—for and while. The for statement is used
to repeat an instruction or a set of instructions a fixed number of times. Whereas, the while
statement is used to repeat a set of instructions until a condition evaluates to true. Let’s discuss
these constructs in brief.
THE FOR STATEMENT
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
Using the range() Function
The range() function is an in-built function of Python. This function generates a list which is
a sequence type. A sequence is a succession of values bound together by a single name. The
range() function is used in the for loop to iterate over the numbers.
Loops in Python 99

