Challenges Completed

PULL_REQUEST_TEMPLATE.md

@@ -1,10 +1,10 @@
 ## DESCRIPTION
 
-Nombre:
-Usuario Platzi:
+Nombre: Jefrien Armando Alvizures Martínez
+Usuario Platzi: jefrien
 
 ## Reto:
 
-- [ ] Primer problema
-- [ ] Segundo problema
-- [ ] Tercer problema
+- [x] Primer problema
+- [x] Segundo problema
+- [x] Tercer problema

src/factorial.js

@@ -1,5 +1,11 @@
 const factorial = (number) => {
   // your code here
+  if (number === 0 || number === 1) return 1
+  let res = 1
+  for (let i = 1; i <= number; i++) {
+    res *= i
+  }
+  return res
 }
 
 module.exports = factorial;

src/fibonacci.js

@@ -1,5 +1,10 @@
 const fibonacci = (n) => {
   // your code here
+  let res = [0, 1]
+  for (let i = 2; i <= n; i++) {
+    res[i] = res[i - 2] + res[i - 1]
+  }
+  return res.slice(1)
 }
 
 module.exports = fibonacci;

src/primalidad.js

@@ -1,5 +1,14 @@
 const trialDivision = (number) => {
   // your code here
+  if (Number.isInteger(number)) {
+    if (number <= 0 || number <= 1) return false
+    for (var i = 2; i <= Math.sqrt(number); i++) {
+      if (number % i == 0) return false
+    }
+    return true
+  } else {
+    return false
+  }
 }
 
 module.exports = trialDivision;