Skip to main content

Comparison and Logical Operators

By
Comparison and Logical operators are used to test for true or false.

Comparison Operators

 Comparison operators are used in logical statements to determine equality or difference between variables or values. Given that x=5, the table below explains the comparison operators:

Operator		 Description Comparing Returns
== is equal to x==8 false
x==5 true
=== is exactly equal to (value and type) x==="5" false
x===5 true
!= is not equal x!=8 true
!== is not equal (neither value nor type) x!=="5" true
x!==5 false
> is greater than x>8 false
< is less than x<8 true
>= is greater than or equal to x>=8 false
<= is less than or equal to x<=8 true

Logical Operators

Logical operators are used to determine the logic between variables or values.
Given that x=6 and y=3, the table below explains the logical operators:
Operator Description Example
&& and (x < 10 && y > 1) is true
|| or (x==5 || y==5) is false
! not !(x==y) is true


Labels:

Comments

Post a Comment

Popular posts from this blog

MySQL Connection

By
Connection with MySQL Database Before accessing database, you must create a connection to the database Syntax: mysql_connect(servername,username,password); where, servername specifies the server to connect to. Default value is “localhost” username specifies the username to log in with. Default value is the name of the user that owns the server process. To connect offline we use username “root”. password specifies the password to log in with. Default is “” Code : Creating connection to the database and selecting the required database <?php $con = mysql_connect(“localhost”,”root”,”"); if (!$con) { die(‘Could not connect: ‘ . mysql_error()); } else{ mysql_select_db(“test”, $con) }; ?> Here, we have store connection in a variable called $con and trap error using die function. Closing connection The connection will be closed automatically when the script ends. To close the connection before, use the mysql_close() function: <?php $con = mysql_conne...
Post a Comment
Read more

Join in MySQL

By
Join clause is used to combine rows from two or more tables depending upon common field between them. There are different kinds of Joins. The most common and useful Join is Inner Join. Inner Join: It will return all rows from multiple tables where the condition is met.
Post a Comment
Read more

CSS List

By
CSS allows you to customize the lists that can be made with HTML  to the extent that even images can be used as bullet points for unordered lists. CSS List Style Type If you want to use something different from the default numbering of ordered lists, or the bullets/discs of unordered lists, then all you have to do is choose a different style for your lists. CSS allows you to select from a wide variety of different list item shapes. Unordered list styles: square, circle, disc (default), and none Ordered list styles: upper-alpha, lower-alpha, upper-roman, lower-roman, decimal (default), and none Code:
Post a Comment
Read more