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C programs QnA

Q. If sum of two integer is 14 and if one of them is 8 then find other integer. Ans: Well, this is very simple. Simply, one integer is 8 and sum of two integers is 14. So, we need to subtract the number 8 from their sum of 14 to get the second number. So, the second number is: 14 - 8 = 6 C-Program of this task Code---> #include<stdio.h> int main () { int num1 = 8 , num2 , sum = 14 ; num2 = sum - num1 ; printf ( "The second number is: %d" , num2 ); return 0 ; }
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C Programs QnA

Q. Do we have to use int in C language even if we dont have any integers in our program?
Ans: No, we don't have to use any integer variable in a C program which doesn't require any integer(s) in the program. Even if we just declare them (integers) the 2 byte memory will be blocked somewhere in the memory (Primary Memory) which creates memory wastage. So, it is better to avoid using integers if it is not required in a C program.
In the other hand, if you are talking about making the main function integer type, then, the answer will be still
NO
. You can make the main function integer type (i.e.: int main) but it is not necessary.

Note: if you have made the main function integer type, do not forget the return 0; statement at the last.

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