From a7cbd79621e9f3ec248393e12fe7ce99af68687b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89rico=20Marshall?= <ericogmarshall1@gmail.com>
Date: Thu, 27 Jan 2022 11:21:27 -0300
Subject: [PATCH] Aula 71 - Recursividade

---
 semana23/aulaRecursividade/index.ts     | 42 +++++++++++++++++++++++++
 semana23/aulaRecursividade/package.json | 13 ++++++++
 2 files changed, 55 insertions(+)
 create mode 100644 semana23/aulaRecursividade/index.ts
 create mode 100644 semana23/aulaRecursividade/package.json

diff --git a/semana23/aulaRecursividade/index.ts b/semana23/aulaRecursividade/index.ts
new file mode 100644
index 0000000..22cdd30
--- /dev/null
+++ b/semana23/aulaRecursividade/index.ts
@@ -0,0 +1,42 @@
+//EXERCÍCIO 1:
+//a)
+const printNumbersCresc = (n: number) => {
+    if (n >= 0) {
+      printNumbersCresc(n - 1)
+      console.log(n)
+    }
+}
+
+//b)
+const printNumbersDesc = (n: number) => {
+    if (n >= 0) {
+      console.log(n)
+      printNumbersDesc(n - 1)
+    }
+}
+
+
+//EXERCÍCIO 2:
+export const calculateSum = (number: number, acc: number = 0): number => {
+    if (number === 0) {
+      return acc
+    }
+    return calculateSum(number - 1, acc + number)
+}
+
+//EXERCÍCIO 3:
+export const calculateSumTo = (n: number): number => {
+    let sum = 0
+    for (var i = 0 ; i <= n ; i++) {
+          sum += i
+    }
+    return sum
+}
+
+//EXERCÍCIO 4:
+export const printArray = (arr: number[], i: number = arr.length - 1) => {
+    if (i >= 0) {
+      printArray(arr, i - 1)
+      console.log(`Elemento ${i}: `, arr[i])
+    }
+}
\ No newline at end of file
diff --git a/semana23/aulaRecursividade/package.json b/semana23/aulaRecursividade/package.json
new file mode 100644
index 0000000..6322b26
--- /dev/null
+++ b/semana23/aulaRecursividade/package.json
@@ -0,0 +1,13 @@
+{
+  "name": "aularecursividade",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "tsc --outFile index.js index.ts && node index.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC"
+}