Primitive data types

1. What is primitive data type ? A basic primitive data type is either of the following:

a.Numbers

i. Whole numbers

-– bytes = 8 bits –1 Bytes

--- Short = 16 bits – 2 Bytes

--- Int / Integer = 32 bits – 4 Bytes

--- Long integer = 64 bits ---- 8 Bytes

Operation involve in whole numbers : +,­,*,/ .If there more than one operator in an arithmetic operation,look at its priority . Operation priority first (* / ),followed by            (+ -).Example :

4-2*5 = -6

4*5/2 = 10

For remainder,we use modulus aka % example,15%6 = 15 MOD 6 = 3 .More example :

8%4 = 0

8%3=2

21%5=1

15%6=3

Operator – Prefix

             -- Postfix

                

 ii.Real numbers ( with decimal)

---Float – 4 Byte – Single precision

---Double – 8 Byte – Double precision

b. Alphaneumeric – Combination of numbers and alphabet ,example SKJ 1013

c. False / True (Boolean).It uses 3 logical operator :

AND - &&

OR = II

NOT = !

And uses relational logic operator :

>

>=

< 

<=

== Equivalent,Example ( n=0,ie n is assigned to 0),but (n==0 ie is n equal to 0? )

!= Not equal