1. LOW vs. HIGH Level Languages
Skill Area 311 Part C
Materials prepared
by Dhimas Ruswanto, BMm

2. Lecture Overview Definition Low & High Level Language
Contrast Low & High Level Language
Differences Low & High Level Language :
Understandable
Ease of writing
Running speed
Writing format

3. LOW vs. HIGH Level language

4. Definition Low level languages: High Level Languages:
Computer language consisting of mnemonics that directly correspond to machine language instructions
High Level Languages:
Basically symbolic languages that use English words and/or mathematical symbols rather than mnemonic codes.

5. Contrast Low Level Languages High Level Languages
Very close to machine language
Concentrate on machine architecture
High Level Languages
Machine-independent programming language
Concentrate of the logic of problem

6. Examples Low Level Language High Level Language Machine language
Assembly language
High Level Language C
C++
BASIC
Java

7. LOW vs. HIGH Level Languages
Differences in terms of:
Understandable
Ease of writing
Running speed
Writing format

8. Understandable Low Level Language: High Level Language:
Mnemonic, binary, hexadecimal
High Level Language:
Simple English and mathematics symbols

9. Adds two numbers and stores the result
Low Level Language:
.model small, C
.586
.data
mov eax,5
mov ebx,10
add eax,ebx
end

10. Adds two numbers and stores the result
High Level Language:
int main() {
//assign to the variable result the value of
int result = ;
return 0; )

11. Ease of Writing Low Level Language: High Level Language:
Designed for the ease of the computer running the language.
Difficult for human to read and write
High Level Language:
Designed for the ease of the person writing the language.
Using language that human can understand, English

12. Running Speed Low Level Language: High Level Language: Faster
No need to compile
More efficient
High Level Language:
Need compiler or interpreter
Translate into machine code
Lower speed execution

13. Running Speed (Example)
Low Level Language:
High Level Language:
4 = 2+2

14. Writing Format Low Level Language: High Level Language:
Set of instructions for processor
High Level Language:
Grammar rules

15. Hello World! Low Level Language .MODEL small .STACK 100h .DATA
HelloMessage DB ‘Hello, world’, 13,10,’$’
.CODE
mov
mov ds,ax
mov ah,9
mov dx,OFFSET HelloMessage
int 21h
mov ah, 4ch
END

16. Hello World! High Level Language #include <stdio.h>
int main(void) {
printf("Hello World!");
return 0; }

17. Summary Low level languages:
Computer language consisting of mnemonics that directly correspond to machine language instructions
High Level Languages:
Basically symbolic languages that use English words and/or mathematical symbols rather than mnemonic codes.
Differences in terms of:
Understandable
Ease of writing
Running speed
Writing format