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

CONTROL STATEMENTS

LOOPING STATEMENTS – FOR LOOP

• A for loop is a repetition control structure that allows you to efficiently write a loop that needs to execute a specific number of times.

Syntax:	Flow Diagram:
for ( init; condition; increment ) { statement(s); }	89

CONTROL STATEMENTS

void main ()
{
int a;
for( a = 10; a < 20; a = a + 1 )
{
printf("%d", a);
}
}
90
LOOPING STATEMENTS – FOR LOOP
Example:
#include
Output:
10 11 12 13 14 15 16 17 18 19

CONTROL STATEMENTS

LOOPING STATEMENTS – WHILE LOOP

• A while loop statement repeatedly executes a target statement as long as a given condition is true.
• Here the condition is checked first, so it is also called as entry control statements

Syntax:	Flow Diagram:
while(condition) { statement(s); }	91

CONTROL STATEMENTS

void main ()
{
int a = 10;
while( a < 20 )
{
printf(" %d", a); a++;
}
}
LOOPING STATEMENTS – WHILE LOOP
Example:
#include
Output:
10 11 12 13 14 15 16 17 18 19

CONTROL STATEMENTS

LOOPING STATEMENTS – DO…WHILE LOOP

• Unlike for and while loops, which test the loop condition at the top of the loop, the do...while loop in C programming language checks its condition at the bottom of the loop.
• A do...while loop is similar to a while loop, except that a do...while loop is guaranteed to execute at least one time.
• This is also called exit control statement.