# <p style="text-align: center">**Programming I Chapter 1**</p>
## <p style="text-align: center">**Intorduction to Programming**</p>
<p style="text-align: right">2022/04/17</p>

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In this chapter, we are going to have an introduction about computers, programs, and programming, after this chapter you should be able to:
## Chapter Objectives:

* Understand the basic concepts of computer memory.
* Understand how programs run.
* Be able to write a Java program.
* Be able to compile Java programs.
* Be able to fix syntax errors.
* Be able to run and test Java Programs.

## Introduction:

### What is a Program:

How do these programs work?
First of all, we write instructions to the computer to execute, as you know the computer won’t understand the regular English Text, so we write a text that is between English and Maths, this code also is very hard for the computer to execute.
But there’s a magic program `(Compilers, Interpreters)` that converts your source code to machine code, the machine code is just a binary that your CPU could understand and execute easily.


<p style="text-align: center">Figure 1: From Problem to Machine.</p>

## Introduction to Java Programming:

### How Java Programs Work:

In Java, we write a java (`source code`) file `(.java)`, which is a text file (You can use any IDE to write code for example use netbeans).

Then this code will be compiled using Java Compiler to an intermediate code (`Bytecode`) file `(.class)`.

This intermediate code will be executed using a program called Java Runtime Environment, the JRE specifically the `JVM` will translate the code to machine code.

<p style="text-align: center">Figure 2: How Java Programs Work.</p>

### Complete Your First Java Source Code!
1. Open netbeans or any other IDE, and paste the following code:

  public class MyProgram {
    public static void main(String[] args) {
        System.out.println("Hi This is my first program!");
    }
}

2. Run your Program:

You might notice that the line `System.out.println`, will print the text between the quotations.

`'println' is the method name`

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## Chapter 1 Assignment:
### Task 1: Compile and fix the following code.
`This program is supposed to compute your age`

import java.util.Scanner;

 public class Task1 {
    public static void main(String[] args){
        System.out.print("Enter your birthyear: );
        Scanner input = new Scanner (System.out);
        int year = input.nextInt();
        int age = 2022 - year
        System.out.println("You are " + age +" years old");
    }
}

### Task 2: Write your first program.

You should write a program that solves the following equation and prints it.
## `The equation:` ==$\frac {5*4+4}{10+2}$==

<p style="text-align: center">Task 2 expected output</p>

==Note==: you should calculate the result in code (Don’t print number 2! :wink: ).

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### Solve the assignment, then submit your asnwers [`Submit here!`](https://forms.gle/4vjM5eCnAWmSwpuJ7)

### The deadline is on `Thursday 21/4/2022 at 12:00 am.`
###### `For more practice look at Chapter 1 questions Page: 52,53 at the attatched book.`
# <p style="text-align: center">**END OF CHAPTER 1**</p>

###### tags: `Java 1` `Programming 1` `Chapter 1`