diff --git a/src/Main.kt b/src/Main.kt
deleted file mode 100644
index a7a5e00..0000000
--- a/src/Main.kt
+++ /dev/null
@@ -1,3 +0,0 @@
-fun main() {
-    println("Hello World!")
-}
\ No newline at end of file
diff --git a/src/Part_1.kt b/src/Part_1.kt
new file mode 100644
index 0000000..16ddab4
--- /dev/null
+++ b/src/Part_1.kt
@@ -0,0 +1,7 @@
+fun main() {
+    val numbers = listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
+    val numbersDoubled = numbers.map(double)
+    println(numbersDoubled)
+}
+
+val double: (Int) -> Int = {number -> number * 2 }
\ No newline at end of file
diff --git a/src/Part_2.kt b/src/Part_2.kt
new file mode 100644
index 0000000..4ab84b6
--- /dev/null
+++ b/src/Part_2.kt
@@ -0,0 +1,18 @@
+//filtering the letter J instead of A   
+fun main(){
+    val namesList = listOf("Johnathan", "Dio", "Joseph", "Giorno", "Josuke", "Diego")
+
+    println(filterNames(namesList,lambdaFuncThatTakesListAndReturnsFilteredList))
+
+}
+
+fun filterNames(listName:List<String>,  lambdaFunction:(List<String>)->List<String>):  List<String> {
+
+    return lambdaFunction(listName)
+}
+
+
+var lambdaFuncThatTakesListAndReturnsFilteredList: (List<String>) -> List<String> =
+                                        {names:List<String> -> names.filter {it.contains("J")}}
+
+//I was getting annoyed at how lambda functions work. So, naming reminds me how they work
\ No newline at end of file
diff --git a/src/Part_3.kt b/src/Part_3.kt
new file mode 100644
index 0000000..f09dccb
--- /dev/null
+++ b/src/Part_3.kt
@@ -0,0 +1,7 @@
+val lambdaSortDescending = {a:List<String> -> a.sortedByDescending {it}}
+
+fun main(){
+    val fruits = listOf("apple", "banana", "kiwi", "strawberry", "grape")
+    println(lambdaSortDescending(fruits))
+
+}
diff --git a/src/Part_4.kt b/src/Part_4.kt
new file mode 100644
index 0000000..63aafaa
--- /dev/null
+++ b/src/Part_4.kt
@@ -0,0 +1,14 @@
+fun main(){
+    println(customFilter(listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)) { it > 5 })
+
+    println(customFilter(listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)) { it % 2 == 0 })
+
+    println(customFilter(listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)) { it % 3 == 0 })
+}
+
+fun customFilter(numbers: List<Int>, filter: (Int) -> Boolean): List<Int> {
+
+    var returnType = numbers.filter(filter)
+
+    return returnType
+    }
\ No newline at end of file
diff --git a/src/Part_5.kt b/src/Part_5.kt
new file mode 100644
index 0000000..555e2cd
--- /dev/null
+++ b/src/Part_5.kt
@@ -0,0 +1,9 @@
+fun main(){
+    val numList = listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
+    println(processNumbers(numList))
+}
+
+fun processNumbers(numbers:List<Int>):List<Int>{
+    var numbersFiltered = numbers.filter { it % 2 == 1 }
+    return numbersFiltered.map { number -> number * number }
+}
\ No newline at end of file