JavaScript Data Types

Numbers

• "no explicit distinction between integers and real" numbers though integers may be stored differently than floating point or real numbers.
• Here are some literal numbers being assigned to a variable (not a complete sampling):

·         x = 8        //integer

·         x = .7343    //floating point

·         x = -4.3e3   //same as -4.3 × 103

·         x = 4.3e-3   //same as 4.3 × 10-3

Boolean Values

• true or false are the two Boolean values
• Examples when true or false values result from an expression (not a complete sampling):

·         10 < 11     //will be evaluated to result in the value true 

·         10 > 11     //will be evaluated to false

Strings

• strings can be created by assigning a literal value to a variable or by creating a String object initialized with a literal string.

·         msg = "I there is no end to the details I have to remember?"

·         msg = new String("Is there is not end to the details I have to remember?")

null

• null - "special key word denoting a null value"

x = null