goto:
- It is a keyword.
- It is a branching statement
- It is used to send the cursor from one location to another location in C program.
- Goto statements transfer the control using labels.
- Label is an identity followed by colon(:)
- Label should follow the rules of identities.
#include<stdio.h>
int main()
{
int a=1;
top:
printf("a value : %d \n", a);
++a;
return 0;
}
We must use goto statement to transfer the control using labels:
#include<stdio.h>
int main()
{
int a=1;
top:
printf("a value : %d \n", a);
++a;
if(a<=10)
goto top;
return 0;
}
We can create multiple labels in a single program.
#include<stdio.h>
int main()
{
top:
printf("Top \t");
center:
printf("Center \t");
bottom:
printf("Bottom \n");
goto top;
return 0;
}
Check this code:
#include<stdio.h>
int main()
{
top:
printf("Top \t");
goto bottom;
center:
printf("Center \t");
bottom:
printf("Bottom \n");
goto top;
return 0;
}
We use goto statement to come out of infinite loop also.
#include<stdio.h>
int main()
{
while(1)
{
printf("Infinite loop \n");
goto end;
}
end:
printf("Can break with goto\n");
return 0;
}
Check the code:
#include<stdio.h>
int main()
{
int x=3;
switch(x)
{
case 0 : printf("C is damn easy \n");
case 1 : printf("C is easy \n");
case 2 : printf("C is bit complex \n");
defalt : printf("C is difficult \n");
}
return 0;
}
- In the above code “default” spelled incorrectly.
- Compile will not generate any error.
- Program output is blank.
- In the above program ‘defalt’ is consider as goto label.
- As we are not writing goto statement the corresponding statement is not executing
