The switch case is a good decision making statement in C language , as if statement has very much complexity in its structure and its difficult to handle multiple decision in with if..else .
- The function of switch statement is to read the variable associated with it as (switch(variable)) and then it check the list of case , the value which matches ,with the case the function or statement associated with it is executed.
Structure of switch-case
variable;
switch (variable)
{
case value-1:
lines to be executed-1;
break;
case value-2:
lines to be executed-1;
break;
}
statements to be executed;
Look friends in this above switch-case statements , the value-1 , value-2 are the title of the case
when any user type this title or value the corresponding lines associated with the case are executed respectively.
- So remember friends when in above structure if you type value-1 then“lines to be executed-1;” this particular line will be executed and program will run further and it will return to “statements to be executed;” statement in program
- Always remember that break function is necessary because if don,t use it your program will execute but suppose if you choose some value then all above values will be executed , and all line,s associated with it will be printed in program .
Example
#include<stdio.h>
#include<conio.h>
void main()
{
int day ; //day is variable which stores input integer value from user
clrscr();
printf("\nenter the number and u will know the day\n\n ");
scanf("%d",&day);
switch(day)
{
case 1:
printf("MONDAY");
break;
case 2:
printf("TUESDAY");
break;
case 3:
printf("WEDNESDAY");
break;
case 4:
printf("THURSDAY");
break;
case 5:
printf("FRIDAY");
break;
case 6:
printf("SATURDAY");
break;
case 7:
printf("SUNDAY");
break;
}
getch();
}
