05. JavaScript Coomparisons

Javascript Comparisons

comparision operators

how to use comparisons

logical operators

conditional operators

comparisions and logical operators are used to test for true or false

Comparision operators

Comparision operators are used in logical statements to determine equality or difference between variables or values

Operator Description

= = is equal to value... is equal to value

= = = is exactly eual to value and type

!= is not equal

> is grater than

< is less than

>= is greater than or equal to 

<= is less than or equal to

How to use comparisions

Comparision operators can be used in conditional statements to compare values and taje action depending on the result.

if(age<18)

document.write("Too Young");

Logical Operators

Logical operators are used to determine the logic between variables or values

Operators Description

&& and

|| or

! not

Conditional Operator

Javascript also contains a conditional operator that assigns a value to a variable based on some conditions.

variablename=(condition)?value1:value2

ex:

greeting=(visitor=="Pres")?Dear President ":"Dear";

If the variable visitor has the value of "Pres", then the variable greeting will be assigned the value "daer president" else it will be assigned "dear"