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Variables & Constant Multiple Choice Questions 1 : Const Variable

Predict the Output of the Following Program if Given Things are -

#include<stdio.h>
void main()
{
const int num ;
num = 10;
printf("%d",num);
getch();
}

Options :

1. 10
2. Nothing Will be Printed
3. Compile Error
4. Run Time Error

Output:

How and Why ?

1. You get Two Errors Here
2. Const Indicates that the Variable is of Constant Type and Cannot be modified
3. num = 10 attempts to modify num in Program Which is Illegal

Rules :

1. Const Variable Should be Initialized as soon as it is declared
2. Const Cannot be Modified

Errors :

1. Constant variable ‘num’ must be initialized
2. Cannot modify a const object