JAVASCRIPT: A Simple Start to jQuery, JavaScript, and HTML5 (Written by a Software Engineer) (Programming, Computer Programming, Programming Pearls, Computer ... Books, jQuery, Coding for Kids Book 1) by Scott Sanderson

Author:Scott Sanderson [Sanderson, Scott]
Language: eng
Format: azw3, epub
Published: 2016-03-06T16:00:00+00:00

&&

Both condition should be true

a && b

||

One or both of the conditions should be true

a || b

AND

Both conditions are true

a AND b

XOR

Only one of the conditions is true

a XOR b

OR

One or both conditions are true

a OR b

!

Negation

!a

The new Operands are fairly unusual, in case you're reaching them with confusion. A few of them even do likewise thing! They are extremely helpful, however, so here's a more intensive look.

The && Operator

The && operator mean AND. Utilize this on the off chance that you require both conditions to be valid, as in our username and password testing. Truth be told, you would prefer not to give individuals access on the off chance that they simply get the username right or just the right password. Here's a sample code to illustrate the concept:

$user_name = 'registered_user';

$pass_word ='secret_password';

if ($user_name =='registered_user' && $pass_word =='secret_password') {

print("Welcome User!");

}

else {

print("Invalid username/password!");

}

The if explanation is used in the same manner as before. However, perceive that now two conditions are continuously tried:

$user_name == 'registered_user' && $pass_word =='secret_password’

This says, "If username is right AND the secret key is right, as well, then give the user access." Both conditions need to go between the round sections of your if proclamation.

The | Operator

The two straight lines mean OR. Utilize this operator when you just need one of your conditions to be true. For instance, assume you need to allow a markdown to individuals in the event that they have used more than 500 pounds OR they have an extraordinary key. Else they don't get any rebate. You'd then code like this:

$total_expenditure =500;

$special_coupon_key =’98765’;

if ($total_spent == 500 | $special_coupon_key == ‘98765') {

print("Discount applies!");

}

else {

print("No discount!");

}

This time we're trying two conditions and just need ONE of them to return a true value. In the event that both of them are true, the code gets executed. On the off chance that they are both false, then PHP will proceed onward.

AND and OR

These are the same as && and || operators, discussed in the previous sections. However, there is an unobtrusive contrast. As a novice, you can just use the following format for implementing AND:

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