Chapter 4.3, Problem 22SCP

Explanation of Solution

Given code snippet:

//declare and initialize the variable

        int count=0;

        //loop to check the number of occurrences

        for(int i=0; i<s.length(); i++)

            //condition initialized to check whether the letter is occurring multiple times

            if(s.charAt(i).toLowerCase=='e') {

                //increment the value

                count++;

            }

        }

Error in the above code:

• In this case, the “toLowerCase” method cannot be called on a char value, which is what is returned by “charAt” method.
• It can be rectified by calling the “Character.toLowerCase” method on the characters of the string.
• The rectified code is given below:

Corrected code:

//declare and initialize the variable

        int count=0;

        //loop to check the number of occurrences

        for(int i=0; i<s...