Goto statements

• The C goto statement is a jump statement which is sometimes also referred to as an unconditional jump statement
• . The goto statement can be used to jump from anywhere to anywhere within a function.

Syntax:

    Syntax1        |   Syntax2 
    ----------------------------
     goto label;   |    label:  
    .              |    .
    .              |    .
    .              |    .
    label:         |    goto label;

   

Explanation:

• In the above syntax, the first line tells the compiler to go to or jump to the statement marked as a label. Here, the label is a user-defined identifier that indicates the target statement.
• The statement immediately followed after ‘label:’ is the destination statement.
• . The ‘label:’ can also appear before the ‘goto label;’ statement in the above syntax.

Disadvantages of Using goto Statement

• The use of the goto statement is highly discouraged as it makes the program logic very complex.
• The use of goto makes tracing the flow of the program very difficult.
• The use of goto makes the task of analyzing and verifying the correctness of programs (particularly those involving loops) very difficult.
• The use of goto can be simply avoided by using break and continue statements.

sample code:

output:

    #include 
                      int main()
                      {
                          printf("%d ", 1);
                          l1:l2:
                          printf("%d ", 2);
                          printf("%d\n", 3);
                      }
                  

    #include 
                      void main()
                      {
                          int i = 5, k;
                          if (i == 0)
                              goto label;
                              label: printf("%d", i);
                              printf("Hey");
                      }