Input Function:
The Input statements read in values from the default or standard input device. In most of the systems, the default input device is the keyboard; therefore the input statement reads values which have been entered by the user, or by the person who is running the script. To let the user know what he or she is assumed to enter, the script should first prompt the user for the specified values.
The simplest input function in a MATLAB is known as input. The input function is used in the assignment statement. To call it, the string is passed, that is a prompt which will emerge on the screen, and what the user types will be stored in the variable named on the left of the assignment statement. To make it simpler to read the prompt, place a colon and then a space after the prompt.