Comparison Operators :

Evaluation conditions :

• == :is equal to, compares two values to see if they are the same
• != : isn’t equal to, compares two values to see if they are not the same
• === : strict equal to, to check both data type and value are the same
• !== : strict not equal to, to check both data type and value are not the same

Logical Operators :

• and (&&) : test more than one condition, it will alwayes return false but in the case of both of the conditions are true it will return true

• or (

  ) : test more than one condition, it will alwayes return true but in the case of both of the conditions are false it will return false

• not (!) : it takes a single boolean value and inverts it

Loops :

it check a condition if it returns true a code block will run and the condition will be checked until it returns false.

Types of loops :

• For : to run a code a specific number of times
• initialization
• condition
• update

for (var i = 0; i < 10; i++) {

}

• While : if you dont know how many times the code should be run.

var i = l ; var msg = ' ' ; 
while (i < 10) {
     msg += i + ' x 5 = ' + (i * 5) + '<br I>'; i++;
 }
document.getEl ementByid( ' answer') . innerHTML = msg;