This document provides information about conditional statements in C programming. It discusses if statements which execute a block of code if a boolean expression is true. It provides the syntax for if-else statements. It also discusses switch statements which allow a variable to be tested against multiple case values and execute the code for the matching case. The syntax for switch statements is also given.

1. Mr. R.D.SIVAKUMAR, M.Sc.,M.Phil.,M.Tech.,
Assistant Professor of Computer Science &
Assistant Professor and Head, Department of M.Com.(CA),
Ayya Nadar Janaki Ammal College,
Sivakasi – 626 124.
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Conditional Statements

2. Conditional Statements
if Statements
This is the most simple form of the branching statements. It takes an expression in
parenthesis and an statement or block of statements. if the expression is true then the
statement or block of statements gets executed otherwise these statements are
skipped.
Syntax:
The syntax of an if...else statement in C programming language is:
if(boolean_expression)
{
/* statement(s) will execute if the boolean expression is true */
}
Else
{ /* statement(s) will execute if the boolean expression is false */
}

3. 4.5 Conditional Statements
Switch Statements
1. A switch statement allows a variable to be tested for equality against a list of
values. Each value is called a case, and the variable being switched on is checked
for each switch case.
Syntax:
The syntax for a switch statement in C programming language is as follows:
switch(expression)
{
case constant-expression :
statement(s);
break; /* optional */
case constant-expression :
statement(s);
break; /* optional */
/* you can have any number of case statements */ default : /* Optional */
statement(s);
}

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