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Another important use of the echo command is to toggle echoing of commands on and off in batch files. Traditionally batch files begin with the @echo off statement. This says to the interpreter that echoing of commands should be off during the whole execution of the batch file, thus resulting in a "tidier" output (the @ symbol declares that this ...
A batch file may contain any command the interpreter accepts interactively and use constructs that enable conditional branching and looping within the batch file, such as IF, FOR, and GOTO labels. The term "batch" is from batch processing, meaning "non-interactive execution", though a batch file might not process a batch of multiple data.
echo began within Multics.After it was programmed in C by Doug McIlroy as a "finger exercise" and proved to be useful, it became part of Version 2 Unix. echo -n in Version 7 replaced prompt, (which behaved like echo but without terminating its output with a line delimiter).
4DOS is a command-line interpreter by JP Software, designed to replace the default command interpreter COMMAND.COM in Microsoft DOS and Windows.It was written by Rex C. Conn and Tom Rawson and first released in 1989.
The batch file below gives the user three choices. [13] The user is directed depending upon his input by evaluating the exit code using the IF ERRORLEVEL command (which tests on "greater or equal"). The selected choice is then printed to the screen using the ECHO command.
Deletes a file. When used on a directory, deletes all files inside the directory only. In comparison, the external command DELTREE deletes all subdirectories and files inside a directory as well as the directory itself. DIR Lists the files in the specified directory. ECHO Toggles whether text is displayed (ECHO ON) or not (ECHO OFF).
A number of COM files in IBM PC DOS 1.0. A COM file is a type of simple executable file.On the Digital Equipment Corporation (DEC) VAX operating systems of the 1970s, .COM was used as a filename extension for text files containing commands to be issued to the operating system (similar to a batch file). [1]
AUTOEXEC.BAT is a system file that was originally on DOS-type operating systems.It is a plain-text batch file in the root directory of the boot device.The name of the file is an abbreviation of "automatic execution", which describes its function in automatically executing commands on system startup; the filename was coined in response to the 8.3 filename limitations of the FAT file system family.