Java Programming by Pearson

96 • Java Programming

Consider a four digit number 1653 .

1

4

 6

4

 5

4

 3

4

 1  1296  81  256  1653

So program proceeds as follows:

First while loop: First fi nd out number of digits; before doing this, save the number in the save variable.

Now number of digits is stored in the count variable. At this stage, num is 0 so copy the value from save

to num. POW is a library function whose prototype is given in header fi le math.h. It returns the number

to the power where fi rst argument is number and second is power, e.g., pow(2, 3) gives 2

3

 8, pow(3, 2)

 3

2

 9.

Second while loop: Steps of second while loop ...