The program is an illustration of while loops.
While loops are used to perform repetitive operations.
The program in Java where comments are used to explain each line is as follows:
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
//This prompts the user for a word
System.out.println("Input a word:");
//This gets user input
String word = scan.nextLine();
//This initializes the index of the string to 0
int index = 0;
//The following is repeated for every character in the string
while (index < word.length()){
//The following if condition checks for every other character in the string, starting from the first
if (index%2 == 0){
//This prints every other character
System.out.print(word.substring(index, index+1));
}
index+=1;
}
}
}
Within the loop, every other character of the string is printed.
See attachment for sample run
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