PROGRAMMING:4.12 - displays the number of digits of an integer

Write a program to read a positive integer and display its digits.
Note: in code listing 4-10, the number of cycles of the while statement is the same as the number of no digits.
-----From exercise 4-11
```
Please enter a positive integer: 1963
The number of digits in 1963 is four.
```
###Input example:
```in
-3
one thousand nine hundred and sixty-three
```
###Output example:
```out
Please enter a positive integer: please do not enter a non positive integer.
Please enter a positive integer: the number of digits in 1963 is 4.
```







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