Given a string of even length, return the first half. So the string “WooHoo” yields “Woo”.

Following are the test cases

Java solution

package test;

public class Program13 {
	public static void main(String[] args) {
		Program13.firstHalf("HelloThere");
		Program13.firstHalf("abcdef");
		Program13.firstHalf("Word");
	}
	public static String firstHalf(String str) {
		return str.substring(0, str.length() / 2);
	}

}

Javascript solution

const firstHalf = (str) => {
    return str.substr(0, str.length/2);
}

console.log(firstHalf("HelloThere")); //Hello
console.log(firstHalf("abcdef")); //abc
console.log(firstHalf("Word")); //Wo