Chapter 6, Problem 19RE

Explanation of Solution

The given code:

//scanning for a value using object of “Scanner” class

int n = in.nextInt();

//creating double variable and initializing with “0”

double x = 0;

//creating double variable “s”.

double s;

//iterating do loop

do

{

    //calculating the value of “s”.

    s = 1.0 / (1 + n * n);

    //incrementing the value of n by “1”.

    n++;

    //the variable x is changed to “x + s”

    x = x + s;

//iterate up to the condition s>0.01

} while (s > 0.01);

Explanation:

The above snippet of code is used to demonstrate “do..while” loop.

In the code,

• Scan for the value “n” using object of “Scanner” class.
• A double variable “x” is created and initialized with “0”.
• A double variable “s” is created.
• Iterate “do..while” loop up to the condition “s > 0.01”.
  • Variable “s” is assigned with “1.0 / (1 + n * n)”.
  • “n” is incremented by “1”.
  • The variable “x” is added with “s”.

“While” loop equivalent to the given “do…while” loop:

//scanning for a value using object of “Scanner” class

int n = in...