Is a NULL value same as zero or a blank space? If not then what is the difference?
A NULL value is not same as zero or a blank space. A NULL value is a value which is ‘unavailable, unassigned, unknown or not applicable’. Whereas, zero is a number and blank space is a character.
what is the use of constructor in c++?
The use of constructors comes when we have to initialise the members of an object, as soon as the object is created
what is void in C language?
Void is an empty data type that has no value. We use void data type in functions when we don’t want to return any value to the calling function.