diff --git a/src/Main.kt b/src/Main.kt
index a7a5e00..9d7a86b 100644
--- a/src/Main.kt
+++ b/src/Main.kt
@@ -1,3 +1,36 @@
 fun main() {
-    println("Hello World!")
+    val numbers = listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
+    val transformedNumbers = numbers.map { it * 2 }
+    println(transformedNumbers)
+
+    val names = listOf("Alice", "Bob", "Amir", "Charlie", "Annie", "David")
+    val filterNames = { listOfName: List<String> -> listOfName.filter { it.contains("a", true) } }
+    println(filterNames(names))
+
+    val fruits = listOf("apple", "banana", "kiwi", "strawberry", "grape")
+
+    println(fruits.sortedByDescending { it.length })
+
+    fun customFilter(numbers: List<Int>, filter: (Int) -> Boolean): List<Int> {
+        return numbers.filter { filter(it) }
+    }
+    println(customFilter(listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)) { it > 5 })
+// Output: [6, 7, 8, 9, 10]
+
+    println(customFilter(listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)) { it % 2 == 0 })
+// Output: [2, 4, 6, 8, 10]
+
+    println(customFilter(listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)) { it % 3 == 0 })
+// Output: [3, 6, 9]
+
+    fun processNumbers(numbers: List<Int>): List<Int> {
+       val oddNumbers = numbers.filter { it % 2 != 0 }
+        return oddNumbers.map { it * it }
+    }
+
+    println(
+        processNumbers(
+            listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
+        )
+    )
 }
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