Question

Suppose a variable is passed By Value to a parameter of a Sub procedure, and the parameter has its value changed inside the Sub procedure. What will the value of the variable be after the Sub procedure has executed?

Answer 1

Answer:

"The value of the variable will remain the same which is already have when the sub-processor is called".

Explanation:

The above question said that:-

void fun(int a)

{

  a=a+1;

}

void main()

{

  int a=5;

  fun(a);

}

//what will be the value of a in the main function after the fun function is excuted.

• Then the answer is: the value of a will be 5 in the main function.
• It is because when the fun function is called, then a variable that is defined in the fun function is a local variable for fun function. That scope after the fun function is null.
• The a variable inside the fun function is a different variable and the main function a variable is also a different variable.
• So when the user prints the value of a variable inside the fun function, it will give the result as 6.
• But when he prints the value of a variable inside the main function, then it will give the value as 5.