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PYTHON—CONDITIONALS
AND LOOPS
There are situations in life when we need to decide based on a situation. For example, if it
rains, I will stay at home or else I shall visit the market. Similar situations arise in programming
as well, where we need to make some decisions and based on these decisions, execute a
set of commands. We need to determine which action is to be taken and which statement
is to be executed, if the outcome is true or false. In this chapter, we will learn about decision
making statements of Python.
DECISION MAKING STATEMENTS
Decision making in Python is done by called conditional statements which decide the flow
of program execution. The following conditional statements are available in Python:
if statement
if...else statement
Nested if statement
if…elif…else ladder
The if Statement
The if statement is the simplest conditional statement. Test Expression False
Here, a statement or a collection of statements within the
if block is executed only if a certain condition or expression True
evaluates to True. If the condition evaluates to False, then
the control of execution is passed to the next statement after Body of if
the if block. The syntax of the if statement is given below:
Syntax:
Statement just
if (Test Expression): below if
Indented statement block
# if block ends here
Program 1: To find the sum of first 5 natural numbers.
90 Touchcode-VIII

