initial commit

bash/leap/leap.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+[[ $# != 1 || ! $1 =~ ^[0-9]+$  ]] && echo "Usage: $0 <year>" && exit 1
+
+year=$1
+leap=false
+if ! (($year % 4)) && (($year % 100))  || !  (($year % 400))
+then
+    leap=true
+fi
+echo $leap
+
+exit 0