Puzzle 11 – Solution

The key to the solution is 'Character is treated as Int while doing arithmetic operations.'

When line 5 x=x+1; gets executed, the Ascii Value of 'x' is added to 1 and the result is an integer.
An integer value cannot be assigned to a char without explicit down casting so the correct way to increment the value of 'x' would be,

x=char (x+1);

Congrats to
1. Joe Smith
for getting the correct answer.