C Program Learning Part-6
Decision Making and Branching
THE SWITCH STATEMENT
The general form of the switch statement is as shown below:
switch (expression)
{
case value-1:
block-1
break;
case value-2:
block-2
break;
………..
………..
default: default-block
break;
}
Statement-x;
printf(“Travel Guide \n”); printf(“A air timings \n”);
printf(“T train timings \n”); printf(“B bus services \n”);
printf(“X to skip \n”); printf(“Enter your choice \n”);
character = getchar();
switch (character)
{
case ‘A’ :
air -display();
break;
case ‘B’ :
bus -display();
break;
case ‘T’ :
train -display();
break;
default:
printf(“No choice”);
}
The GOTO Statement:
C supports the goto statement to branch unconditionally from one point to another in the program. The goto requires a label in order to identify the place where the branch is to be made. A level is any valid variable name, and must be followed by a colon. The label is placed immediately before the statement where the control is to be transferred.
The general forms of goto and label statements are shown below:
C – continue statement with example
The continue statement is used
inside loops. When a continue statement is encountered inside a loop, control
jumps to the beginning of the loop for next iteration, skipping the execution
of statements inside the body of loop for the current iteration.
Example:
#include
int main()
{
int i;
for(i=1;i<=5;i++)
{
if(i==2)
{
continue;
}
printf("%d ",i);
}
}
Break statement in C
The break statement in C programming has the following two usages −
When a break statement is encountered inside a
loop, the loop is immediately terminated and the program control resumes at the
next statement following the loop. It can be used to terminate a case in the switch
statement If you are using nested loops, the break statement will stop the
execution of the innermost loop and start executing the next line of code after
the block.
Example-1:
#include
int main()
{
int i;
for(i=1;i<=10;i++)
{
if(i==8)
{
break;
}
printf("%d ",i);
}
}
Example-2:
#include
int main()
{
double x, y;
int count;
count=1;
printf("Enter five real number
in a line. \n");
read:
scanf("%lf",&x);
printf(" \n");
if(x<0)
{
printf(“Value%d negative”,count);
}
else
{
Y=sqrt(x);
printf("%lf \t %lf
\n",x,y);
}
count=count+1;
if(count<=5)
goto read;
printf("End of
computation.");
return 0;
}
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