Case control statements in C Language

     The statements which are used to execute only specific block of statements in a series of blocks are called case control statements.

There are 4 types of case control statements in C language. They are,

1. switch
2. break
3. continue
4. goto

1. switch case statement in C Language:

• Switch case statements are used to execute only specific case statements based on the switch expression.
• Below is the syntax for switch case statement.

switch (expression)
{
         case label1:   statements;
                                break;
         case label2:   statements;
                                break;
         default:          statements;
                                break;
}

Example program for switch..case statement in C Language:

C

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#include <stdio.h> int main () {    int value = 3;    switch(value)    {    case 1:       printf("Value is 1 \n" );       break;    case 2:       printf("Value is 2 \n" );       break;      case 3:       printf("Value is 3 \n" );       break;    case 4:       printf("Value is 4 \n" );       break;    default :       printf("Value is other than 1,2,3,4 \n" );    }    return 0; }

Output:

Value is 3

2. break statement in C:

• Break statement is used to terminate the while loops, switch case loops and for loops from the subsequent execution.
• Syntax: break;

Example program for break statement in C:

C

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#include <stdio.h> int main() {   int i;   for(i=0;i<10;i++)   {       if(i==5)       {           printf("\nComing out of for loop when i = 5");     break;       }       printf("%d ",i);   }     }

Output:

0 1 2 3 4 Coming out of for loop when i = 5

3. Continue statement in C Language:

• Continue statement is used to continue the next iteration of for loop, while loop and do-while loops.  So, the remaining statements are skipped within the loop for that particular iteration.
• Syntax : continue;

Example program for continue statement in C Language:

C

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#include <stdio.h> int main() {   int i;   for(i=0;i<10;i++)   {       if(i==5 || i==6)       {           printf("\nSkipping %d from display using " \                  "continue statement \n",i);     continue;       }       printf("%d ",i);   }     }

Output:

0 1 2 3 4 Skipping 5 from display using continue statement Skipping 6 from display using continue statement 7 8 9

4. goto statement in C Language:

• goto statements is used to transfer the normal flow of a program to the specified label in the program.
• Below is the syntax for goto statement in C.

{
         …….
         go to label;
         …….
         …….
         LABEL:
         statements;
}

Example program for goto statement in C Language:

C

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#include <stdio.h> int main() {   int i;   for(i=0;i<10;i++)   {       if(i==5)       {           printf("\nWe are using goto statement when i = 5");           goto HAI;       }       printf("%d ",i);   }     HAI : printf("\nNow, we are inside label name \"hai\" \n"); }

 Output:

0 1 2 3 4 We are using goto statement when i = 5 Now, we are inside label name “hai”

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