more robust, and working

script.sh

@@ -0,0 +1,22 @@
+#! /bin/bash
+#
+set -euo pipefail
+IFS=$'\t\n'
+if [ $# -ne 2 ] ; then
+   echo "gimme a min and max"
+   exit 1
+fi
+
+min=$1
+max=$2
+
+i=0
+
+v=$((($RANDOM % $max)))
+while [ $v -lt $min ] ; do
+   v=$((($RANDOM % $max)))
+   i=$(((i+=1)))
+done
+
+echo "$v"
+exit $i