Switch Statements in C | ShreeSanaviAcademy Portal for Students

Introduction Generations of Computers Classification of Computers Basic Anatomy of a Computer System Memory Management Computer Software Operating System

Algorithm Flowcharts

Programming Language Generations of Programming Languages Introduction to C Structure of C Programming Language Integrated Development Environment First C program, Hello World Executing a C Program Constants in C Variables in C C Storage Classes and Storage Class Specifiers

Introduction Arithmetic operators Relational Operators Logical Operators Assignment Operator Increment and Decrement Operators Conditional Operators Bitwise Operators Precedence and Associativity

Control Instructions in C if Statement in C if-else Statement Nested if-else statement else if ladder Switch Statements in C

Loops Introduction for Loop while loop in C do-while Loop break and continue statements

Array in C One Dimensional array Two Dimensional Array Multidimensional Arrays

Modular Programming Functions

Searching Techniques Linear Search Algorithm Binary-Search-Algorithm

Sorting Introduction Bubble Sort

What is Strings Standard Library String Functions

Structure Introduction Defining a Structure Declaration of Structure Example of Structure Union Introduction Defining a Union Accessing Union Members

Pointers in C Accessing the Address of a variable Pointer Operations

Dynamic Memory Allocation

Switch Statements

The control statement that allows us to make a decision from the number of choices is called a switch.

Syntax of switch

switch ( choice ) 
{ 
case 1 : 
statement 1 ; 
break ; 
case 2 : 
statement 2 ; 
break ; 
….
……
default:
statement ;
break;
}

How Switch Statements works

Switch case checks the value of expression/variable against the list of case values and when the match is found , the block of statement associated with that case is executed
Expression should be Integer Expression / Character
Break statement takes control out of the case.
Break Statement is Optional.

Sample Program on switch statement

void main( )
{
int per;
printf("enter per:\n");
scanf("%d",&per);
if(per>=60)
per=6;
else
per=per/10;
switch(per)
{
case 6: 
printf ( "First division" ) ;
break;
case 5:
printf ( "Second division" ) ;
break;
default:
printf ( "fail" ) ;
}
getch();
}

Rules for Switch values

- Case Label must be unique
- Case Labels must ends with Colon
- Case labels must have constants
- Case label must be of Integer, Character type
- Case label should not be ‘floating point number ‘
- Default label is Optional.
- Relational and logical Operators are not allowed in Switch Statement.

Fundamentals of the Computer System

Introduction to Algorithm

Programming Basics

Operators in C

Conditional Branching

Iteration and Loops

Array in C

Functions in C

Searching Algorithms

Sorting Algorithms

Strings

Structures and Union

Pointers in C

File Handling in C

Advanced

Switch Statements

Syntax of switch

How Switch Statements works

Sample Program on switch statement