Page 139 - CodePilot V5.0 C7

Output

Enter a number:9
You have entered a positive number.
Odd

Enter a number:-4
You have entered a negative number.
Even

IF..ELIF….ELSE STATEMENT

Python provides the elif(else-if) statement
to check for multiple conditions and execute Start
the code block within if any of the conditions
are evaluated to be true. True
The elif statement is optional like the else if condition 1 block 1
statement but multiple elif statements
False
can be used in a block of code following an if
statement. True

Syntax of the if..elif….else statement: if condition 2 block 2

if condition1:
False
Statement block 1

elif condition2: True
if condition 3 block 3
Statement block 2
elif condition3: False
block
Statement block 3
.. Stop

..
else:

Statement block n
The interpreter starts at the top, testing condition1. If it is true, statement block 1 is executed and
the rest of the constructs are ignored. If it is false, the control moves down and checks condition2,
if it is true, statement block 2 will be executed and if it is false, it moves next to condition3 and so
on. The process repeats till a true condition is found. In case none of the conditions evaluate to
true, the block after the else is executed.

Program 6 To take marks of a student as input and display a message based on the marks:
∑ If the marks are equal or more than 90, show “Excellent”
∑ If equal or more than 70, show “Very Good”

137
Flow of Control in Python