DSSB_2017

Question

Choose the statement that are syntactically incorrect in C language?

1.for( ; ; );

2./* this is a /* a valid */ comment*/

3.return 5;

4.return(6+3);

Comments

2 is wrong. You can break it like this.
 /* this is a /*
a valid
*/ comment*/

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You just copy please explain how is it wrong .

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/* this is a /*   ==> This is comment.
a valid         ==> This will give error. Because it is not a comment.
*/ comment*/  ==> This is also comment.

for( ; ; ); This is correct. This is infinite loop. Conditional part is always true.

For option 3 and 4, They are very obvious. They are  correct.

Answer 1

a function can return only one value at a time,

Comments

But in line 4 it is not returning two values. It is adding 6 and 3 and then returning their sum.

Answer 2

Only 2 is incorrect. As we know a comment in C starts with /* and ends with */. There is no concept of nested comment in C . Once we put */ , the comment ends there. Rest of the line is considered as redundant and hence is synctactically incorrect in C