Question

The elements of an integer-valued array can be set to 0 (i.e., the array can be cleared) recursively as follows: An array of size 0 is already cleared; Otherwise, set the last of the uncleared elements of the array to 0, and clear the rest of the array Write a void method named clear that accepts an integer array, and the number of elements in the array and sets the elements of the array to 0.

Answer 1

Answer:

The method definition to this question can be given as:

Method definition:

public void clear(int[] arr, int num) //define method clear.

{

   if (num == 0) //if block

{

       return 0;  return value.

}

else //else block

{

 arr[num - 1] = 0; //assign value in arr.

return arr[];  //return value.

}

}

clear(arr, num - 1);   //calling

Explanation:

The description of the above method definition as follows:

• Firstly we define a method that is "clear" that does not return any value because its return type is "void". This method accepts two integer variables that are "arr[] and num" where arr[] is an array variable and num is an integer variable.
• Inside a method, we use a conditional statement in if block we check that num variable value is equal to 0. if this condition is true so, it will return 0 otherwise it will go to else block in else block it will assign value in variable arr[num-1] that is "0" and return arr value.