diff --git a/index.js b/index.js
index e69de29..dc486f4 100644
--- a/index.js
+++ b/index.js
@@ -0,0 +1,170 @@
+
+//1
+const arrayVacio = []
+
+//2
+const arrayNumeros = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+
+//3
+const arrayNumerosPares = [ 0, 2, 4, 6, 8]
+
+//4
+const arrayBidimensional = [[ 0, 1, 2], [ 'a', 'b', 'c']]
+
+
+//5
+function suma ( a, b) {
+    return a + b
+}
+
+//6
+function potenciacion ( a, b) {
+    return a ** b
+}
+
+//7
+function separarPalabras (string) {
+    return string.split(' ')
+}
+
+//8
+function repetirString (string, number) {
+    return string.repeat(number)
+}
+
+//9
+function esPrimo (number) {
+    for (let i = 2; i < number; i++) {
+        if (number % i === 0) {
+            return false
+        }
+    }
+    return true
+}
+
+
+//10
+function ordenarArray ( array) {
+    return array.sort()
+}
+
+//11
+function obtenerPares( array) {
+    let newArray = []
+    for (let i = 0; i < array.length; i++) {
+        if (array [i] % 2 === 0)
+        newArray.push(array[i])
+    }
+    return newArray
+}
+
+//12  no va
+function pintarArray (array) {
+    let newString = ''
+    for (let i = 0; i < array.length; i++) {    
+        if (i !== 0 && (i+1) < array.length){       //elements in between
+            newString += ' ' + array[i].toString() + ','
+        } else if ((i+1) === array.length) {        //last element
+            newString += ' ' + array[i].toString() +']'
+        } else {                                    //first element
+            newString += '['+ array[i].toString() + ','
+        }
+    }
+    return newString
+}
+
+//13
+function arrayMapi (array, fArray) {
+    let newArray = []
+    for (let i = 0; i < array.length; i++) {
+        fArray(array[i])
+        newArray.push(fArray(array[i]))
+        
+    }
+    return newArray
+} 
+
+//14   al crear una instancia con nuestro array, se eliminan todos los repetidos
+function eliminarDuplicados(array) {
+    return [...new Set(array)]
+}
+
+
+//15
+const arrayNumerosNeg = [0, -1, -2, -3, -4, -5, -6, -7, -8, -9]
+
+//16
+const holaMundo = ['Hola', 'Mundo']
+
+//17
+const loGuardoTodo = ['hola', 'que', 23, 42.33, 'tal']
+
+//18
+const arrayDeArrays = [[756, 'nombre'], [225, 'apellido'], [298, 'direccion']]
+
+
+//19
+function multiplicacion (a, b) {
+    return a * b
+}
+
+//20
+function division (a, b) {
+    return a / b
+}
+
+//21
+function esPar (a) {
+    if (a % 2 === 0) {
+        return true
+    }
+    return false
+}
+
+//22
+const arrayFunciones = [
+    function suma(a, b) {
+        return a + b
+    }, 
+    function resta(a, b) {
+        return a - b
+    },
+    function multiplicacion(a, b) {
+        return a * b
+    }]
+
+
+//23
+function ordenarArray2 (array) {
+    return array.sort()
+}
+
+//24
+function obtenerImpares(array) {
+    let newArray = []
+    for (let i = 0; i < array.length; i++) {
+        if (array[i] % 2 !== 0) {
+            newArray.push(array[i])
+        } 
+    }
+    return newArray
+}
+
+//25
+function sumarArray (array) {
+    let suma = 0
+    for (let i = 0; i < array.length; i++) {
+        suma += array [i]
+    }
+    return suma
+}
+
+//26
+function multiplicarArray (array) {
+    let multiplicacion = 1
+    for (let i = 0; i < array.length; i++) {
+        multiplicacion *= array [i]
+        
+    }
+    return multiplicacion
+}
\ No newline at end of file