D Programming – Arrays

One of the concepts I love is arrays. I really like putting values inside one container. Feels like cheating and magic at the same time. It can store values and even variables, it can also be one-dimensional or multi-dimensional, and it just solves many problems.

Below is the code for declaring and accessing arrays:

import std.stdio;

int main(){
	int numbers[4] = [5,1,3,10];
	int sum = 0;
	
	for(int i = 0; i<numbers.length; i++){
		sum+= numbers[i];
	}
	
	writeln("The sum is ", sum);
	
	return 0;
}

Here is the output:

 

d-arrays

 

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D – Programming (Strings)

In programming, Strings are group of characters and they are not those strands of fiber that we tie knots or tie somebody’s neck. I often introduce students to this concept by making them count the letters of their name and resite them in reverse. Quite really fun at times. 🙂

Below is a code that shows string initialization and concatenation:

import std.stdio;

int main(){
	string fname = "Mark";
	string lname = "Hay";
	
	writeln("Hello ", fname, " ", lname);
	
	return 0;
}

Here is the output:

d-strings

 

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Thank you very much.

D Programming – While Loop

Hello there, below is a program that show a basic while loop. It is very much like the syntax of C++ and Java. It is really good to remember the parts of a loop like the starting value, end statement and the operation of increment or decrement. Enjoy! 🙂

import std.stdio;

int main(){
	int i = 0;
	
	while(i<11){
		writeln(i);
		i++;
	}
	
	return 0;
}

Here is the output:

d-while

 

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Thank you very much.

D – Basic Output

In this tutorial, I will be introducing you to a language called D. We will be creating a simple program that outputs “Hello World” on the screen.

First, you should download D here: http://dlang.org/download.html

 

Then, install the software. Installation is very easy because all you need to do is read and follow the directions.

 

After installation, create a new folder in My Documents named tutorials.

While inside the tutorials folder, create a new text document and rename it output.d.

Open the file with your favorite text editor (I love to use Notepad++).

Type the codes same as below:

d1

 

 

Open your command prompt.

Next, change your directory using the cd command.

type dmd then the name of your file

type the name of the exe file that was generated.

our output should be the same as below:

 

d2

 

 

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Python – Basic Output (print)

In this tutorial, I will be introducing you to a language called Python. We will be creating a simple program that outputs “Hello World” on the screen.

First, you should download python here: https://www.python.org/downloads/

 

Then, install the software. Installation is very easy because all you need to do is read and follow the directions.

 

After installation, create a new folder in My Documents named tutorials.

While inside the tutorials folder, create a new text document and rename it tut1.py.

Open the file with your favorite text editor (I love to use Notepad++).

Type the codes same as below:

 

py1

Next, open the program named IDLE(Python GUI).

We should have the same screen as below.

py2

 

Click File -> Open, locate the file you created named tut1.py.

The window below should appear.

py3

 

Click Run -> Run Module.

The program will run your program and the output should be the same as below.

py4