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Lecture 3

COP3502: Introduction to CIS I. Lecture 3. +. +. -. -. C-. B / B-. A- / B+ / B. A. A+. --, ++. +. +. -. -. 6. 7. 4. 8. 5. -- (2), ++ (10). 681-800 A 641-680 A- 591-640 B+ 541-590 B 501-540 B- 461-500 C+ 421-460 C 381-420 C- < 380 E. discussions.

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Lecture 3

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  1. COP3502: Introduction to CIS I Lecture 3

  2. + + - - C- B / B- A- / B+ / B A A+ --, ++

  3. + + - - 6 7 4 8 5 --(2), ++(10)

  4. 681-800 A 641-680 A- 591-640 B+ 541-590 B 501-540 B- 461-500 C+ 421-460 C 381-420 C- < 380 E

  5. discussions

  6. Scratch Meets Java System.out.println(“Hello, World!”)

  7. Scratch Meets Java (1 < 2) (x > 5) (x < y && x > z)

  8. Scratch Meets Java if (x < 5) { **Do something** } else { *Do something else** }

  9. Scratch Meets Java for (inti = 0; i < 10; i++) { **Do something** }

  10. Scratch Meets Java while (true) { **Do something** }

  11. variables

  12. variables type, name, value

  13. variables type, name, value declaration: inti;

  14. i int

  15. variables type, name, value initialization/assignment: i = 0;

  16. 0 i int

  17. variables type, name, value declaration + initialization: inti = 0;

  18. types

  19. 1.25 n 0 i int double

  20. 8 bits = 1 byte

  21. types • byte • short • int • long • float • double • boolean • char

  22. types • byte = 8-bits • short = 16-bits • int = 32-bits • long = 64-bits • float = 32-bits • double = 64-bits • boolean = not well defined • char = 16-bits

  23. types • byte • short • int (integer numbers) • long • float • double (decimal point numbers) • boolean (true or false) • char (letters, punctuation, symbols)

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