Write a program request the user to enter an uppercase letter. Use nested loops to produce a pyramid pattern like this:
A
ABA
ABCBA
ABCDCBA
ABCDEDCBA
The pattern should extend to the character entered. For example, the preceding pattern would result from an input value of E. Hint: Use an outer loop to handle the rows. Use three inner loops in a row, one to handle the spaces, one for printing letters in ascending order, and one for printing letters in descending order. If your system doesn't use ASCII or a similar system that represents letters in strict number order, see the suggestion in programming exercise 3.