—used to point the scale of enormous variety b : the device of fineness of halftones expressed as the quantity of display traces to the linear inch
The tip of the HELP command output from RT-11SJ displayed with a VT100 If far more in depth assist is essential than furnished by a program's crafted-in interior assist, numerous systems support a focused exterior support command" command (or comparable), which accepts a command identify as contacting parameter and can invoke an external assist system.
An MS-DOS command line, illustrating parsing into command and arguments A command-line argument or parameter is really an product of data offered to your application when it is began.
Two overhead conductor rails for the same monitor. Left, one,200 V DC to the Uetliberg railway (the pantograph is mounted asymmetrically to collect current from this rail); ideal, 15 kV AC for the Sihltal railway Some railways made use of two or 3 overhead lines, generally to hold 3-stage current.
In contrast to a button or menu item inside of a GUI, a command line is usually self-documenting,[16] stating exactly what the person needs completed. In addition, command strains normally include things like several defaults which might be modified to customise the outcome. Practical command traces is often saved by assigning a personality string or alias to depict the entire command, or a number of instructions is usually grouped to execute a far more complex sequence �?for instance, compile This system, put in it, and run it �?making a one entity, referred to as a command technique or script which itself might be addressed as being a command.
prompt �?output by This system to point that its Prepared for input; a prompt may perhaps involve contextual facts and sometimes ends which has a image that provides a visible cue that input is expected
Several agent samples of command-line possibilities, all relating to listing documents inside of a directory, For example some conventions: Operating system
A command-line choice or just alternative (also known as a flag or change) modifies the Procedure of a command; the outcome is determined because of the command's application. Possibilities Adhere to the command title on the command line, separated by Areas.
An application system may possibly assist get more info none, any, or these a few key sorts of command-line interface mechanisms:
A CLI is applied Each time a substantial vocabulary of commands or queries, coupled with a large (or arbitrary) array of solutions, might be entered a lot more rapidly as textual content than having a pure GUI. This is often the case with functioning program command shells.
Many Laptop video clip game titles characteristic a command line interface often often called a console. It is typically utilized by the game builders during growth and by mod developers for debugging needs along with for cheating or skipping aspects of the game.
DEC VT52 terminal The earliest personal computers did not guidance interactive input/output equipment, typically relying on perception switches and lights to talk to the computer operator. This was adequate for batch units that ran a single application at a time, normally With all the programmer performing as operator.
Through the sixties onwards, user conversation with desktops was mostly by the use of command-line interfaces, initially on devices similar to the Teletype Model 33 ASR, but then on early CRT-based mostly Laptop or computer terminals such as the VT52.
Electrical trains that obtain their present from overhead traces use a tool for instance a pantograph, bow collector or trolley pole. It presses from the underside of the bottom overhead wire, the Get in touch with wire. Existing collectors are electrically conductive and permit latest to flow via for the practice or tram and again into the feeder station through the steel wheels on 1 or the two managing rails.