SS 2 WEEK FOUR LESSON NOTE (ICT_323)

 

Ss2

TOPIC: BASIC Programming Language

Introduction  

BASIC is an acronym for Beginner’s All-purpose Symbolic Instruction Code. It is a family of general-purpose, high-level programming languages whose design philosophy emphasizes ease of use.

Basic Character

A character is any letter, digit, punctuation, symbol or any other sign used in the presentation of information in any language. BASIC has the following character set.

Alphabets A,B,C………Z

Numeric 0,1,2,3………9

Caret (exponentiation) ^

Asterisk (multiplication) *

Slash (division operation) /

 Minus (subtraction) –

Plus (addition) +

Dollar Symbol (string) $

Ampersand &

Basic fundamentals

The two fundamentals of BASIC programing language are constant and variable.

Constant: constants are static value the BASIC interpreter uses during program execution. There are two types of constants, which are:

1.     String constants:  a string constant is a sequence of 0 - 255   alphanumeric characters enclosed in a double quotation mark. For example, “TOLULOPE”, “TONAD PUBLICATION”.

2.     Numeric constant: numeric constantans can be positive or negative. For instance, if the number 50,200 were to entered as a constant, it would be typed as 50200.

BASIC operators

Symbol operator

Meaning

Example

+

Addition

A+B

-

Subtraction

A-B

*

Multiplication

A*B

/

Division

A/B

^ (or **)

Exponentiation

A^B or (A**B)

  BASIC Language statement

The general format of BASIC statements is:

Xxx   Reserved Word     Parameter

Where

Xxx is the line number; Reserved word is the statement (instruction) type; and parameters are the variables used in conjunction with the statement type.

Classification of BASIC programming statements

a.     Remark statement e.g. REM

b.     Information entry statement e.g. INPUT, READ-DATA.

c.      Data manipulation statement e.g. LET

d.     Output statement e.g. PRINT

e.     Loop statement e.g. FOR….NEXT,  WHILE…… NEXT.

f.       Control statement e.g. GOTO, IF-THEN, GOSUB.

g.     Program termination statement e.g. END, STOP.

Comments

Post a Comment

Popular posts from this blog

JSS 2 WEEK TWO LESSON NOTE_FIRST TERM 2023

Image
  Jss2 TOPIC: CLASSIFICATION OF COMPUTER BY GENERATION OBJECTIVE At the end of this topic you should be able to:  1. List the criteria for classifying computers.          I.                   2. State the features of computers classified based on technological age. Introduction Computers can be classified into different categories based on different criteria. Basically, computers can be classified based on the following criteria: 1.      Size. 2.      Types 3.      Generation 4.      Purpose or versatility Based on the technological Age of the computer, computers can be classified into: ·         First generation ·         Second generation ·         Th...
Read more

SSS TWO WEEK TWO LESSON NOTE (ICT_223)

Image
  Ss2 TOPIC:   HANDLING COMPUTER FILES Introduction File operation deals with the physical movement of data in and out of files. User programs effectively use file operations through appropriate programming language syntax. The file management system manages the independent files and acts as the software interfaces between the user programs and file operations. Basic Operations of Computer Files 1.     Insertion: records must be inserted at the place dictated by the sequence of the keys. As   obvious, direct insertion into the main data file would   lead to frequent rebuilding of the file. This problem could be mitigated by reserving overflow areas in the file for insertions. But this leads to wastage of space and also the overflow areas may also be filled. 2.     Deletion: deletion is the reverse of insertion. The space occupied by the record should be free for use. 3.     Updating: updating is a combinat...
Read more

JSS ONE WEEK THREE LESSON NOTE (ICT_223)

Image
  Jss1 TOPIC:   MASTERY OF THE KEYBOARD Introduction A computer keyboard is the most commonly used input device. It is defined as the set of typewriter-like keys that enables you to enter data into a computer or other devices. Computer keyboard are similar to electric-typewriters but contain additional typing keys. The standard arrangement of alphabetic keys on the keyboard is known as the QWERTY. The computer keyboard could be wired or wireless. Types of keyboard There are different types of keyboard depending on what they are used for. Some have more keys than the others. Keyboards also come in different shapes but basically a keyboard has regular shape. The types of keyboards are: a)      Enhanced keyboard b)     Standard keyboard   c)      Windows keyboard d)     AT keyboard   Sections of the Keyboard The keyboard is divided into the following sections: ...
Read more