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## Solution: To be upper case or not to be?

class challenge_four {
    public static String test(String x) {

        if (x.length() % 2 == 0) {
            return x.toUpperCase();
        }

        return x.toLowerCase();
    }
    public static void main( String args[] ) {
        String odd = "Hello";
        String even = "John";
        System.out.println( "Hello:" + test(odd));
        System.out.println( "John:" + test(even));
    }
}

## Understanding the code
$$$$

* **Line 4:** The **if condition** first finds the length of the input String. This is done by using the method, `x.length()`. Then it checks whether the length, when **divided by 2** gives a zero remainder or not. Given that the **remainder** is `0`, the input variable, `x` is **even** so *line 5* will be executed. If not, then jump to *line 8*. 

* **Line 5:** `returns` the `upper case` String `x`. 
* **Line 8:** Provided this **if** condition is not met, on **line 4** the `lower case` version of String `x` is **returned**.

# Solution: To be upper case or not to be?

# Understanding the code
$$$$

* **Line 4:** The **if condition** first finds the length of the input String. This is done by using the method, `x.length()`. Then it checks whether the length, when **divided by 2** gives a zero remainder or not. Given that the **remainder** is `0`, the input variable, `x` is **even** so *line 5* will be executed. If not, then jump to *line 8*. 

* **Line 5:** `returns` the `upper case` String `x`. 
* **Line 8:** Provided this **if** condition is not met, on **line 4** the `lower case` version of String `x` is **returned**.

In this review, solution of the challenge 'Playing With Strings' from the previous lesson is provided.

Getting Started with Java!

Variables & User Input

Simple Maths & Logic

Strings and String Processing

Conditional Statements

Loops

Methods

Arrays

Classes and Inheritance

Generics

ArrayLists

Java Exam

Solution Review: Playing With Strings

Solution: To be upper case or not to be? #

Understanding the code