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IF is a conditional statement, that allows branching of the program execution. It evaluates the specified condition, and only if it is true, then it executes the remainder of the command line. Otherwise, it skips the remainder of the line and continues with next command line. Used in Batch files. The command is available in MS-DOS versions 2 ...
The Call command allows subroutines within batch file. The Call command in COMMAND.COM only supports calling external batch files. File name parser extensions to the Set command are comparable with C shell. [further explanation needed] The Set command can perform expression evaluation. An expansion of the For command supports parsing files and ...
The C programming language provides many standard library functions for file input and output.These functions make up the bulk of the C standard library header <stdio.h>. [1] The functionality descends from a "portable I/O package" written by Mike Lesk at Bell Labs in the early 1970s, [2] and officially became part of the Unix operating system in Version 7.
Command-line interpreter (Shell): COMMAND.COM: This is the command interpreter. User configuration files: AUTOEXEC.BAT: This is run by the default shell (usually COMMAND.COM) to execute commands at startup. CONFIG.SYS: This contains statements to configure DOS and load device drivers. Standard DOS utility programs:
The category OS/2 commands deals with articles related to internal and external commands supported by members of the OS/2 family of operating systems including ArcaOS. Commands which are specific to DOS should be listed in Category:DOS commands (or its sub-categories); commands which exist in both environments should be listed in both Category ...
The following batch file changes the title of the Command Prompt window to "Updating files" while the copy command is being executed. After the command is executed, the text "Files updated" is displayed using the echo command, and the title of the Command Prompt window is changed back to "Command Prompt".
Cut out selected fields of each line of a file System III cxref: C programming Optional (XSI) Generate a C-language program cross-reference table System V date: Misc Mandatory Display the date and time Version 1 AT&T UNIX dd: Filesystem Mandatory Convert and copy a file Version 5 AT&T UNIX delta: SCCS Optional (XSI) Make a delta (change) to an ...
Upon completion of listing all files and directories found, tree returns the total number of files and directories listed. There are options to change the characters used in the output, and to use color output. [8] The command is available in MS-DOS versions 3.2 and later and IBM PC DOS releases 2 and later. [9]