This document provides an overview of different types of control structures in C programming language. It discusses conditional structures like if, else if, and switch statements. It also covers loop structures like while, do while, and for loops. Finally, it mentions the break and continue commands used to control loops. The document was prepared by trainees of Baabtra as part of a mentoring program and is not an official Baabtra document. It includes contact details for Baabtra offices in Kerala, India.

2. Disclaimer: This presentation is prepared by trainees of
baabtra as a part of mentoring program. This is not official
document of baabtra –Mentoring Partner
Baabtra-Mentoring Partner is the mentoring division of baabte System Technologies Pvt .
Ltd

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DIFFERRENT TYPE OF
CONTROL STRUCTURES IN C

6. CONDITIONAL STRUCTURES:
1) If statement
If the condition is true the statement inside the parenthesis{}, will be
executed, else the control will be transferred to the next statement after if.
Syntax:
if(boolean_expression)
{
/*statement(s) will execute if the boolean expression is true */
}
Else
{
/*statement(s) will execute if the boolean expression is false */
}

7. 2) If else statement
In if else, if the condition is true the statements between if and else is
executed. If it is false the statement after else is executed.
Syntax:
if(condition)
{
Valid c statements;
}
else
{
Valid c statements;
}

8. 3)Else if statement
In else if, if the condition is true the statements between if and else if is executed. If
it is false the condition in else if I checked and if it is true it will be executed. If none of
the condition is true the statement under else is executed.
Syntax: else if(condition n)
if(condition) {
{ valid c statements;
Valid c statements; }
} else
Else if(condition 1) {
{ valid c statements;
Valid c statements; }
}
-
-

9. 4) Switch statements
Switch statement can also called matching case statement. If matches the value in
variable with any of the case inside, the statements under the case that matches will
be executed. If none of the case is matched the statement under default will be
executed.
Syntax: break;
switch(variable) default:
{ valid c statements;
case 1: break;
Valid c statements; }
break;
-
-
Case n:
Valid c statements;

10. LOOP STRUCTURES:
1) While
The most basic loop in C is the while loop. A while statement is like a repeating if
statement. Like an if statements, if the test condition is true : the statements get
executed. The difference is that after the statement have been executed, the test
condition is checked again. If it is still true the statements get executed again. This cycle
repeats until the test condition evaluates to false.
Syntax:
while(expression)
{
single statement
or
block of statements
}

11. 2) Do while
Do while is just like a while loop except that the test condition is checked at the end of
the loop rather than the start. This has the effect that the content of the loop are always
executed at least once.
Syntax:
do
{
Single statement
Or
Block of statements;
}while expression;

12. 3) For loop
For loop is similar to while, it’s just written differently. For statements are
often used to process lists such a rage of numbers:
Syntax:
For(expression1; expression2; expression3)
{
single statement
or
block of statements;
}

13. C PROVIDES TWO COMMANDS TO CONTROL HOW
WE LOOP:
1) BREAK
When break statement used in a loop, the loop is
im m ed iately term in ated an d p ro gram co ntro l res u m es
at th e n ex t statem ent fo llo win g th e lo o p .
Flow diagram:-
Syntax:
break;

14. 2) CONTINUE
I t is s ometime d es irab le to s kip s ome
statem ents in s id e th e loop . I n s u ch cas es , contin u e
statement are used.
Flow diagram:
Syntax:
continue;

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