You can write new variable values with or without Delayed Expansion. Without delayed expansion you can swap the value of two variables in one line: Set var1=% ...
Delayed variable expansion is often useful when working with FOR Loops, normally an entire FOR loop is evaluated as a single command even if it spans multiple ...
2011年7月13日 — A real problem often exists because any variables set inside will not be exported when that batch file finishes. So its not possible to export, ...
2020年7月18日 — Delayed Expansion will cause variables within a batch file to be expanded at execution time rather than at parse time, this option is turned on ...
2021年7月22日 — By the way, have you ever tried setlocal EnableDelayedExpansion , then set MyVar=abcdefg , and then echo !MyVar:bcd=123! or echo !MyVar:~0,-2! ?
2024年3月31日 — You can do this without using Delayed Expansion (without setlocal enabledelayedexpansion ), by using a for (loop) with call. @echo off ...
2023年2月3日 — enabledelayedexpansion, Enables the delayed environment variable expansion until the matching endlocal command is encountered, regardless of the ...
