Unix is an operating system. It was developed in the 1970s at the Bell Labs research center by Ken Thompson , Dennis Ritchie , and others. Today there are more than 400 standard operating systems based on unix operating system (They are called unix like operating system) such as Linux, Redhat, Ubuntu, Fedora, Kali, Macintosh, and more. Its mean if you know any one unix kernel based operating system you can operate all 400 standard operating systems. Unix commands ls : To list all folders and files of current directory ls -l : To list all folders and files of current directory with more details (with permissions and stuff) mkdir : To create an new directory in current path touch : To create a new file rm <YourFileName> : To delete your file rm -rf <YourDirectoryName> : To delete your complete folder cd : To change directory (go to inside a ...
JavaScript : It is used for EVENT HANDLING There are two ways to use it. 1) Write function in HTML file itself. For example <html> <head> <script type="text/javascript" src="message.js"> function msg(){ alert("Hello Javatpoint"); } </script> </head> <body> <p>Welcome to JavaScript</p> <form> <input type="button" value="click" onclick="msg()"/> </form> </body> </html> 2) Write JavaScript code in separate file and import it into HTML. For example aleena.js ---------- function msg(){ alert("Hello Javatpoint"); } aleena.html ----------- <html> <head> <script type="text/javascript" src="aleena.js"></script> </head> <body> <p>Welcome to JavaScript</p> <form> <input type="button" v...
Programming Languages ---------------------------------- Programming langauges are used to develop software applications (e.g. facebook, whatsapp, banking application etc) There are many programming languages like C, C++, Java, Python and more. Those who work on programming languages are called Software programmer or Software developer C language ========== -mother of all langauges -Denies Ritche -1972 Example (hellowo rd.c) #include <stdio.h> void main () { printf ( "hello aleena" ); } Example : what is variable ? Example variable and datatype #include <stdio.h> void main (){ int age = 12 ; float percentage = 76.99 ; char name [] = { 'a' , 'l' , 'e' , 'e' , 'n' , 'a' }; printf ( "Name = %s" ,...
Comments
Post a Comment