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I'm trying to write a batch file that performs operations depending on the result of a modulus operation performed on a set variable. However, I can't seem to get it quite right.
To first of all test my syntax for the mathematical operation, I've been trying to get a simpler script to produce desired results.
:START
SETLOCAL
SET /P Input-Num="Input Number: "
SET /A Input-Num=%Input-Num% %% 2
ECHO %Input-Num%
ENDLOCAL
PAUSE
:END
If I input 5, the expected output is 1. However, instead I get a message saying Missing operator. and then it outputs 5.
What am I doing wrong here?
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%%a are special variables created by the for command to represent the current loop item or a token of a current line. for is probably about the most complicated and powerful part of batch files. If you need loop, then in most cases for has you covered.
usebackq. Specifies to run a back-quoted string as a command, use a single-quoted string as a literal string, or, for long file names that contain spaces, allow file names in <set> , to each be enclosed in double-quotation marks.
A batch file is simply a text file saved with the .bat file extension. It can be written using Notepad or any other text editor. A simple batch file will be: // When echo is turned off, the command prompt doesn't appear in the Command Prompt window. ECHO OFF // The following command writes GeeksforGeeks to the console.
To create a Windows batch file, follow these steps: Open a text file, such as a Notepad or WordPad document. Add your commands, starting with @echo [off], followed by, each in a new line, title [title of your batch script], echo [first line], and pause. Save your file with the file extension BAT, for example, test.
Using SET /P is your problem, as 5 is no longer treated as a numerical value. Your example as above works as expected
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