diff --git a/07_collections/multidimensional.v b/07_collections/multidimensional.v
new file mode 100644
index 0000000..3f85c0d
--- /dev/null
+++ b/07_collections/multidimensional.v
@@ -0,0 +1,43 @@
+pub fn main()
+{
+	mut a := [][]int{len: 2, init: []int{len: 3}}
+	a[0][1] = 2
+	println(a)
+
+	mut a1 := [][][]int{len: 3, init: [][]int{len: 3, init: []int{len: 3}}}
+	println(a1)
+
+	a1[0][1][1] = 2
+	println(a1)
+
+	nums := [1,2,3]
+	nums_copy := nums.clone()
+	println(nums_copy)
+
+	nums1 := [1,2,3,4,5,6]
+
+	even := nums1.filter(it % 2 == 0)
+	println(even)
+
+	even_fn := nums1.filter(fn (x int) bool{
+		return x % 3 == 0
+	})
+
+	println(even_fn)
+
+	words := ['hello','world'] 
+	upper := words.map(it.to_upper())
+	println(upper)
+
+	upper_fn := words.map(fn (w string) string{
+		return w.upper()
+	})
+
+	println(upper_fn)
+
+	nums2 := [1,2,3]
+	println(num2.any(it == 2))
+	println(num2.all(it >= 2))
+
+	
+}	
\ No newline at end of file