add if loop

2025-07-17 18:23:15 +02:00 · 2018-12-19 17:59:27 +08:00
parent 934f793da8
commit 89c34e4347
1 changed files with 4 additions and 0 deletions
--- a/README.md
+++ b/README.md
@ -899,6 +899,10 @@ else
  echo >&2 "Fatal error. This script requires mydir."
 fi

+# if variable is null
+if [ ! -s "myvariable" ]
+#True of the length if "STRING" is zero.
+
 # Test if file exist
 if [ -e 'filename' ]
 then