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# 1.4 Exercises

1. **True/False**: All variables, parameters, and methods must have a declared type in Java, and the type can never change.
2. Suppose we have a function `smaller(a, b)` that takes in two `int` arguments `a` and `b` and returns the smaller of the two. What would the expression `String x = smaller(10, 20) + 3;` output?
3. Choose all statements that are true in Java: 
   * All code must be part of a class.
   * The end and beginning of code segments are delimited using curly brackets `{}`. 
   * All statements in Java end with a semi-colon `;`.
   * Any code we want to run must be inside of a function `public static void main(String[] args)`. 

<details>

<summary>Solutions</summary>

1. True. See "Static Typing" for more information.
2. This line of code would cause a compilation error because the declared type `String` is incompatible with the type returned by `smaller` and adding `3`, which would be an `int.`
3. All the following statements are true.

</details>


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