This document provides an introduction to programming languages and language translators. It defines key terms like program, programming language, and programmer. It describes different types of programming languages including low-level languages like machine language, middle-level languages like assembly language, and high-level languages. It also discusses different language translators like assemblers, compilers, and interpreters and their roles in translating source code into object code.

1. INTRODUCTION TO
COMPUTER
Lecture #4

2. Introduction To programming Languages
Language Translators

3. Programming Language
 Program:
 A program is a set of step by step instructions that directs
a computer to do certain tasks.
 Programming Language:
 Programming language is a set of rules that a
programmer uses to write computer programs.
 Programmer:
 A program is the I.T professional who writes computer
programs.

4. Types of Programming
languages
 Lo w Le ve llang uag e : It is the language that is very close to
machine.
 Machine lang uag e : Machine language is called language of
computers. It is also called binary language as it consists of tow
numbers 0s and 1s.
 Middle le ve llang uag e :
 Asse m bly lang uag e : it is the very next level of programming
language introduced after machine language. This language used
short and simple words know as mnemonics which stand for
machine code instructions.
 Hig h le ve llang uag e :
 high level languages are so called because they are very close to

5. Language Translators
 Asse m ble r:
 This type of translators only works for assembly language, it
converts program written in assembly language into machine
language.
 Co m pile r:
 They are program which convert the program written in high
level language into machine language whole program at a time
before execution.
 Inte rpre te r:
 They are program which convert the program written in high
level language into machine language one instruction at a time.

6. Source Program and Object
Program
 Source Program: The program that is written in any
language other than binary language is called source
program and it is so called source code.
 Object Program :The program that is in binary language is
called object program and this program is also called object
code.

7. Source Program and Object
Program
 Source Program: The program that is written in any
language other than binary language is called source
program and it is so called source code.
 Object Program :The program that is in binary language is
called object program and this program is also called object
code.