CC-4 : Sum of letters.

Description:

Given input String str with lowercase characters, find the integer equivalent of each character and find sum of all characters in str after conversion to integers as mentioned above.

Test cases and expected outputs:

Input Parameters	Expected outputs
str1="hello";	52
str1="boy";	42
str1="java";	34

Pseudocode:

The java method should accept following input parameters: str (String).

Extract the characters from str into char array names chars.

Declare an integer variable alphaSum, we will use this to store sum of letters converted into integers.

Iterate through chars using for loop using idx as loop variable, starting from index 0 and incrementing idx till we reach chars.length-1:

For each character in chars, convert character to integer using this code: ((str.charAt(idx)-'a')+1.

Increment alphaSum with above integer in each iteration.

When above loop completes, alphaSum contains the sum of characters converted to integers, so return alphaSum.

Code:

public int stringAlphabetSum(String str) {
	char[] chars=str.toCharArray();
	int alphaSum=0;
	for (int idx=0;idx < chars.length;idx++) {
		alphaSum += ((str.charAt(idx)-'a')+1);
	}
	return alphaSum;
}

Click here to download and run code and test cases !

Below fully running code can be copied and run on Eclipse or other Java IDEs. Refer the classname in code below. If the class name below is "A", save the code below to a file named A.java before running it. Be sure to try your own test cases to enhance your understanding ! You can also tweak the code to optimize or add enhancements and custom features.

public class StringAlphabetSum {
	
	
public int stringAlphabetSum(String str) {
	char[] chars=str.toCharArray();
	int alphaSum=0;
	for (int idx=0;idx < chars.length;idx++) {
		alphaSum += ((str.charAt(idx)-'a')+1);
	}
	return alphaSum;
}

	
public static void main(String[] args) {
	StringAlphabetSum sp=new StringAlphabetSum();
	int retVal;
		
	try {
	String str1="hello";
	System.out.println("\n\nThe original string is: \n"+str1);
	retVal=sp.stringAlphabetSum(str1);
	System.out.println("\n\nAlphabet sum: \n"+retVal);
			
	str1="boy";
	System.out.println("\n\nThe original string is: \n"+str1);
	retVal=sp.stringAlphabetSum(str1);
	System.out.println("\n\nAlphabet sum: \n"+retVal);
			
	str1="java";
	System.out.println("\n\nThe original string is: \n"+str1);
	retVal=sp.stringAlphabetSum(str1);
	System.out.println("\n\nAlphabet sum: \n"+retVal);
			
	}catch (Exception exception) {
	System.out.print("Exception,"+ exception);
	exception.printStackTrace();
				
	}
}
		

}