Programming Fundamentals

TRIVUz Academy
www.trivuzAcademy.com

Why Programming?
 What is Computer?
 What is Program?
 What is Programming?

So, Program is
Some instruction computer follow
to do our task. And this sequence
of instructions is called a program.

And, Programming is
The process of writing programs is
called programming.

What is the PROCESS?

Continue…

Follow the steps given below to
become a successful programmer:

 Define
the problem: Examine the problem until you
understand it thoroughly.

 Outline the solution: Analyze the problem.

Continue…
 Expand the outline of the solution into an algorithm:
Write a step-by-step procedure that leads to the
solution.
 Test
the algorithm for correctness: Provide test data
and try to work out the problem as the computer
would. This is a critical step but one that programmers
often forget.

Continue…
 Convert the algorithm into a program: Translate the
instructions in the algorithm into a computer program
using any programming language.
 Document the program clearly: Describe each line of
instruction or at least some important portions in the
program. This will make the program easy to follow
when accessed later for corrections or changes.

Continue…
 Run the program: Instruct the computer to execute
the program. The process of running the program
differs from language to language.
 Debug the program: Make sure that the program runs
correctly without any errors or bugs as they are called
in computer terminology. Finding the errors and fixing
them is called debugging. Don’t get depressed when
bugs are found. Think of it as a way to learn.

Prerequisite… ?

Almost nothing… 

Platform… ?
Mac, Linux, Windows….

Any of them…

How old are you?
What is your educational Background?

I don’t care… 

So, Who Are You?
You are currently a computer user

who love to use computer.
And definitely you are a user of a
program.

You are going to be…
 The creator of the Program.
 You will be the Programmer.

So again, What is programming?
 When we want a computer to perform a specific task,
such as generating a marks sheet or a salary slip, we
have to create a sequence of instructions in a logical
order that a computer can understand and interpret.
This sequence of instructions is called a program. The
process of writing programs is called programming.

The task of programming involves a lot of effort and careful
planning. Without this, the computer will produce erroneous
results. The following steps should go into the planning of
program:

 Defining and analyzing the problem

 Developing the solution logically using an algorithm

Defining and analyzing the problem
Before writing a program, we have to define
exactly what
 Data we need to provide (input) and
 Information we want the program to produce
(the output).
Once we know these, we can figure out how to develop the solution.

Understanding INPUT
Suppose we want to write a program to work out
the total and average of a student’s marks in five
subjects, we would need to mention the marks
in the five subjects as input.

Understanding OUTPUT
Next, we have to think of the output — the
elements that should be displayed and those
that should not. In the marks example, since the
task is to prepare a marks sheet, the marks in all
the five subjects, their total and average should
be displayed on the screen.

INPUT
Bangla = 60
English = 80
Math = 100
History = 70

PROCESSING

Average = (Bangla + English + Math + History) / 4

Lets write our very first program
 Get Inputs from the user
 Save them somewhere
 Use a math logic to process
 Show the result / output.

Getting INPUTS
 Make a user interface to collect INPUT from user

Handling Inputs
var a = (input for bangla)
var b = (input for english)
var c = (input for math)
var d = (input for history)

Processing & Output
var average; // another variable
average = (a + b + c + d) / 4;

print average;

OUTPUT
 Our program process the input and show this output.

VARIABLE

 What is variable?
 Variable Naming?

Lab - 1
 Let’s try variable in PHP environment

Input Interface
<html>
<head><title>Programming – 1</title></head>
<body>
<form name="test" method="GET”>
Name:
<input type="text" name=”InputName" />
<input type="submit" name="submit" value="Go" />
</form>
</body></html>

Programming Process
<?php
if(isset($_GET['InputName'])) {

$name = $_GET['InputName'];
echo $name ;
} else {
// some other code or load form
}
?>

Another Input
<html>
<body>
Name:
<input type="text" name=”num" />
<input type="submit" name="submit" value="Go" />
</form>
</body></html>

Programming Process
<?php
if(isset($_GET[’num'])) {

$number1 = $_GET[’num'];
echo $number1;
$sqr = $number1 * $number1;
echo “<br /> “ . $sqr;
} else {
// some other code or load form
}
?>

Make a Simple Calculator
<html>
<body>
Name:
<input type="text" name=”num1" />
<input type="text" name=”num2" />
<input type="submit" name="submit" value=”Sum" />
</form>
</body></html>

Class Contents
Get all class contents & codes from our site

http://trivuzacademy.com/class-content.php

Assignment
 Read some article regarding data types
 Read some article regarding numbers
 Read some article proved by Academy
 Write some article regarding all of these

Q&A
TRIVUz Academy
www.trivuzAcademy.com

THANK YOU

MS Alam TRIVUz
trivuz@gmail.com

Programming Fundamentals

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Programming Fundamentals