Page 283 - Computer Science V2.0 Class 11

Sample Output:
>>> Enter first number :3
>>> Enter second number :2
>>> Enter third number :1
Maximum of 3 2 1 : 3

1. Which conditional statement can check for multiple values of a single variable?
2. Name any two operators that are used to join two or more Boolean conditions.

Let's Summarise

Ø The order of execution of the statements in a program is known as flow of control.

Ø In sequential flow, the program begins with the execution of the first statement and continues with the rest
of the statements in a sequential manner.

Ø In the case of conditional flow, the execution of the statements depends upon whether the conditional
expression yields True or False.
Ø A compound statement often spans several lines. It comprises one or more header clauses and one or more
sequences of statements, called suites.
A header clause begins with a keyword and ends with a colon.
A suite may comprise one or more statements.
The suite, following a header clause, appears at the next level of indentation.

Ø pass statement is ignored by the interpreter.
Ø An if statement executes a sequence of statement(s) if the conditional expression yields (on evaluation)
True.
Ø if-else statement is used when:
a sequence of statements is to be executed if the conditional expression yields (on evaluation) True.
another sequence of statements is to be executed if the conditional expression yields (on evaluation)

False.
Ø An elif clause is used when different actions are required to be taken based on different conditions
(often different values of a single control variable).

Ø An if/if-else/if-elif-else statement is called nested if it encloses another if/if-else/
if-elif-else statement.

Solved Exercises

A. Multiple Choice Questions.
1. Which of the following if statement is syntactically correct?
a. if number >=10:
b. If (number >= 10)
c. if number >= 10, then
d. If number >=10 then

Conditional Statements 269