8escs01 problem solving through programming unit-2: c programming basics

CONTROL STATEMENTS

BRANCHING STATEMENTS – IF STATEMENT

• An if statement consists of a boolean expression followed by one or more statements.

Syntax:	Flow Diagram:
if(condition) { Statements; }

CONTROL STATEMENTS

void main ( )
{
int a = 10;
if( a < 20 )
{
printf("a is less than 20\n" );
}
printf("value of a is : %d\n", a);
}
BRANCHING STATEMENTS – IF STATEMENT
Example:
#include
Output:
A is less than 20 Value of a is: 10

CONTROL STATEMENTS

BRANCHING STATEMENTS – IF..ELSE STATEMENT

• In if…else control statement, group of statements are executed when condition is true.
• If condition is false, then else part statements are executed.

Syntax:	Flow Diagram:
if(condition) { True Statements; } else { False statements; }

CONTROL STATEMENTS

void main ( )
{
int a = 100;
if( a < 20 )
{
printf("a is less than 20\n" );
}
else
{
printf("a is not less than 20\n" );
}
printf("value of a is : %d\n", a);
}
80
BRANCHING STATEMENTS – IF..ELSE STATEMENT
Example:
#include
Output:
A is not less than 20 Value of a is: 100

CONTROL STATEMENTS

81
BRANCHING STATEMENTS – ELSE..IF STATEMENT

• An if statement can be followed by an optional else if...else statement, which is very useful to test various conditions using single if...else if statement.