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LOW vs. HIGH Level Languages

LOW vs. HIGH Level Languages. Skill Area 311 Part C. Materials prepared by Dhimas Ruswanto , BMm. Lecture Overview. Definition Low & High Level Language Contrast Low & High Level Language Differences Low & High Level Language : Understandable Ease of writing Running speed

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LOW vs. HIGH Level Languages

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  1. LOW vs. HIGHLevel Languages Skill Area 311 Part C Materials prepared by DhimasRuswanto, 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. HIGHLevel language

  4. Definition • 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.

  5. Contrast • Low 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 • 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: • 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 5 + 10 int result = 5 + 10; return 0; )

  11. Ease of Writing • Low 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: • 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: 00110100 00100000 00111101 00100000 00110010 00101011 00110010 • High Level Language: 4 = 2+2

  14. Writing Format • Low 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 ax,@data mov ds,ax mov ah,9 mov dx,OFFSET HelloMessage int 21h mov ah, 4ch int 21h 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

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