Let us take a simple expression 4 + 5 is equal to 9. Here 4 and 5 are calledoperands and ‘+’ is called the operator. JavaScript supports the following types of operators. Arithmetic Operators Comparision Operators Logical (or Relational) Operators Assignment Operators Conditional (or ternary) Operators Lets have a look on all operators one by … Read more
JavaScript Datatype One of the most fundamental characteristics of a programming language is the set of data types it supports. These are the type of values that can be represented and manipulated in a programming language. JavaScript allows you to work with three primitive data types − Numbers, 123, 120.50 etc. Stringsof text e.g. “This … Read more
Let us take a sample example to print out “Hello World”. We added an optional HTML comment that surrounds our JavaScript code. This is to save our code from a browser that does not support JavaScript. The comment ends with a “//–>”. Here “//” signifies a comment in JavaScript, so we add that to prevent … Read more
What is python? Python is an interpreted programming language. As it is a programming language so it tells a computer what to do. However, the computer doesn’t read the language directly – there are hundreds of programming languages, and it couldn’t understand them all. So, when someone writes a program, they will write it in … Read more
What is a Dialer? Dialer is an application used in call centres to automate the process of dialing to external phone numbers so that the agents can attend to certain calls. A dialer (American English) or dialler (British English) is an electronic device that is connected to a telephone line to monitor the dialed numbers and alter them to seamlessly provide … Read more
What is Asterisk? Asterisk is an open source framework for building communications applications. Asterisk turns an ordinary computer into a communications server. Asterisk powers IP PBX systems, VoIP gateways, conference servers and other custom solutions. It is used by small businesses, large businesses, call centers, carriers and government agencies, worldwide. Asterisk is free and open … Read more
The 3 ways to insert CSS into your web pages There are three ways of inserting a style sheet: External style sheet Internal style sheet Inline style External style sheet With an external style sheet, you can change the look of an entire website by changing just one file! Each page must include a reference … Read more
What is CSS selectors? CSS selectors allow you to select and manipulate HTML elements. CSS selectors are used to “find” (or select) HTML elements based on their id, class, type, attribute, and more. There are many types of selectors. We will describe here each of them with example. Element Selectors: For example if we talk … Read more
Hashes are one of the data structures available in Perl.A hash is an un-ordered group of key-value pairs. The keys are unique strings. The values are scalar values. Each value can be either a number, a string, or a reference. We’ll learn about references later. Hashes, like other Perl variables, are declared using the my keyword. The … Read more
SSH- SECURE SHELL It is used to Connect to the remote system through secure shell. It giveyou a copy of remote shell on your desktop.You can also create password less login to the remote system with the help of PUBLIC/PRIVATE keys. 1.For installing SSH open the terminal and type :- # su <— to become root and enter the password> # yum install openssh-server 2. After the completion of … Read more