How to use Comparison and Logical Operators in JavaScript?

[Beter 2 Burn Out]

I have recently turned towards the JavaScript. I knew many comparison and logical operators (not all), but I don't know how to use that operators. I want to compare and use some logic in my program, so I want that operators to be used in my program. So please tell me how to use Comparison and Logical Operators in JavaScript.?? Since I don't know the all operators, please provide me same.

[MELTRONICS]

If your program want to do some comparing or want to perform some logical operations, you can use the Comparison and Logical Operators. The Comparison and Logical operators are used to test for true or false. Also the The Conditional Operator is handy for quickly assigning a different value to a variable depending on the outcome of a condition. Comparison operators are used in logical statements to determine equality or difference between variables or values. Whereas the logical operators are used to determine the logic between variables or values.

[Viensterrr]

The following is the list of the Comparison operator.

1. == This operator is equal to and used to check whether, variable is equal to or not. It returns false, if the answer is negative.
2. != This is not equal. Returns true, if it is correct.
3. > Used to check whether the variable is greater than or not.
4. < Used to check whether the variable is less than or not.
5. >= This is greater than or equal to.
6. <= This operator is less than or equal to.

[Deabelos]

You can use the Comparison operators for the conditions. You will have to keep in mind that the comparison operators can be used in conditional statements to compare values and take action depending on the result. Have a look at the example below :

if (age>50) document.write("You are old");

If you enter the age more than 50, then it will display the message "You are old".

[kyosang]

You will have to use the Logical Operators if you want to do some logical working. The following are the Logical Operators :

1. && (AND) - This operator is used to compare 2 expressions.
2. || (OR) - This operator is used for doing the logical or conditions.
3. ! (NOT) - This operator is used when you have to do some negative conditions.

[void]

You can also use the Conditional Operator in JavaScript which contains a conditional operator that assigns a value to a variable based on some condition. The Conditional Operator is handy for quickly assigning a different value to a variable depending on the outcome of a condition. The syntax for the conditional operating :

variablename=(condition)?value1:value2

The following is the example for conditional operator :

greeting=(visitor=="PRIN")?"Respected Principal ":"Respected ";

In the above example, if the variable visitor has the value of "PRIN", then the variable greeting will be assigned the value "Respected Principal " else it will be assigned "Respected".