Priamry data type
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This document discusses different data types in Java including integer, long, double, float, string, and char. It explains that variables allow data to be saved in RAM and describes the width and number of digits for each data type. Examples are provided to demonstrate how to declare variables of each type and perform operations on them. Special escape sequences that can be used in strings are also listed.
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Priamry data type
- 1. AD6-Hussain Ali 202342200 AD6-Mousa 202342200 Application Development - 3 TTC Collage 2014/12/01
- 2. Content • Idea of Variable • Data Type • Integer & Long • Double & Float • String & Char
- 3. Idea of Variable • Allow us to save data into RAM
- 4. Data Type Number TEXTDecimal String CharDouble FloatInteger Long
- 5. Integer & Long • Allow us to sign value that is number like 88 with its name into RAM. Name Width Digit long 64 15 int 32 9
- 6. Example int a = 12345588; int b = 2233477; long c = (long) a * (long) b ; System.out .println(c);
- 7. Double & Float • Allow us to sign value that is decmal number like 50.11 with its name into RAM. Name Width in Bits Digit double 64 308 float 32 38
- 8. Example float f1 = 4.4f; double d1 = 5.234d; System.out.println( d1 + f1 );
- 9. String & Char • Allow us to sign value that is character like ‘S’ or “ahmad” with its name into RAM. Name Width in Bits characters String 64 2147483647 Char 8 1
- 10. Example String Ahamd = “Ahamd Ali Mohamad” ; char x = Ahamd.charAt(0) ; System.out.println(Ahamd + “ = ” + x);
- 11. Special escape sequences Notation Character represented n Newline (0x0a) r Carriage return (0x0d) f Formfeed (0x0c) b Backspace (0x08) s Space (0x20) t tab " Double quote ' Single quote backslash ddd Octal character (ddd) uxxxx Hexadecimal UNICODE character (xxxx)