diff --git a/conceitos_basicos/contador.js b/conceitos_basicos/contador.js
new file mode 100644
index 0000000..b1abd84
--- /dev/null
+++ b/conceitos_basicos/contador.js
@@ -0,0 +1,7 @@
+for (i = 1; i< 100; i++) 
+{
+    if (i/3 == parseInt(i/3) && i/5 == parseInt(i/5)) console.log("FizzBuzz");
+    else if (i/3 == parseInt(i/3)) console.log("Fizz");
+    else if (i/5 == parseInt(i/5)) console.log("Buzz");
+    else console.log(i);
+}
\ No newline at end of file
diff --git a/conceitos_basicos/palindromo.js b/conceitos_basicos/palindromo.js
new file mode 100644
index 0000000..74da549
--- /dev/null
+++ b/conceitos_basicos/palindromo.js
@@ -0,0 +1,19 @@
+let str = "arara";
+
+// cria vetor a partir da string dada pelo usuario -> split
+let rev = str.split("");
+// inverte a ordem dos elementos do vetor-> reverse
+rev = rev.reverse();
+// junto elementos do vetor em uma string -> join
+rev = rev.join("");
+
+for(i=0, test = true; i < str.length;i++)
+{
+    if (str[i] != rev[i])
+    {
+        test = false;
+        console.log("\"" + str +"\""+" não é um palíndromo");
+        break;
+    }
+}
+if (test == true) console.log("\"" + str+"\""+" é um palíndromo");
\ No newline at end of file
diff --git a/conceitos_basicos/triangulo.js b/conceitos_basicos/triangulo.js
new file mode 100644
index 0000000..84b4ea0
--- /dev/null
+++ b/conceitos_basicos/triangulo.js
@@ -0,0 +1,6 @@
+var n_linhas = prompt ("Digite a quantidade de linhas");
+for (i = 1; i <=n_linhas; i++) 
+{
+    for( j=0, hash="#" ; j<i ; j++ ) hash +="#";
+    console.log(hash);
+}
\ No newline at end of file
diff --git a/conceitos_basicos/xadrez.js b/conceitos_basicos/xadrez.js
new file mode 100644
index 0000000..6bcb775
--- /dev/null
+++ b/conceitos_basicos/xadrez.js
@@ -0,0 +1,7 @@
+var n_linhas = prompt ("Digite a quantidade de linhas");
+for (i = 1, alt=true; i <=n_linhas; i++, alt=!alt) 
+{
+    var hash = "# # # # #"
+    if (alt ==true) console.log(hash);
+    else console.log (" "+hash);
+}
\ No newline at end of file
diff --git a/funcao/contador_char.js b/funcao/contador_char.js
new file mode 100644
index 0000000..9da1838
--- /dev/null
+++ b/funcao/contador_char.js
@@ -0,0 +1,13 @@
+function countChars(frase,len ,c)
+{
+    let n_vezes = 0;
+    var vet_frase = frase.split("");
+
+    for(i = 0; i < len; i++)
+    {
+        if (vet_frase[i] == c) n_vezes++;
+    }
+    return n_vezes;
+}
+var str = "arrivederci"
+console.log(countChars(str,str.length, "r"));
\ No newline at end of file
diff --git a/funcao/min_max.js b/funcao/min_max.js
new file mode 100644
index 0000000..7021a9d
--- /dev/null
+++ b/funcao/min_max.js
@@ -0,0 +1,45 @@
+function min (a, b)
+{
+    let max;
+    let min;
+    let inter = 0;
+    if ( a > b )
+    {
+        inter = a - b;
+        max = a;
+        min = b;
+    } 
+    else 
+    {
+        inter = b - a;
+        max = b;
+        min = a;
+    }
+
+    if (inter == 0) return NaN;
+    return min + 1;
+}
+function max (a, b)
+{
+    let max;
+    let min;
+    let inter = 0;
+    if ( a > b )
+    {
+        inter = a - b;
+        max = a;
+        min = b;
+    } 
+    else 
+    {
+        inter = b - a;
+        max = b;
+        min = a;
+    }
+
+    if (inter == 0) return NaN;
+    return max - 1;
+}
+let x = min(2,6);
+let y = max(2,6);
+console.log("min:", x +"\nmax:", y);
\ No newline at end of file
diff --git a/funcao/mod.js b/funcao/mod.js
new file mode 100644
index 0000000..edf6060
--- /dev/null
+++ b/funcao/mod.js
@@ -0,0 +1,6 @@
+function mod (num,mod)
+{
+    if (num/mod == parseInt(num/mod)) return true;
+    else return false;
+}
+console.log(mod(8,2));
\ No newline at end of file
diff --git a/funcao/mod2.js b/funcao/mod2.js
new file mode 100644
index 0000000..97ca556
--- /dev/null
+++ b/funcao/mod2.js
@@ -0,0 +1,6 @@
+function mod2 (number)
+{
+    if (number/2 == parseInt(number/2)) return true;
+    else return false;
+}
+console.log(mod2(8));
\ No newline at end of file
diff --git a/objetos_arrays/deep_equal.js b/objetos_arrays/deep_equal.js
new file mode 100644
index 0000000..d43c87a
--- /dev/null
+++ b/objetos_arrays/deep_equal.js
@@ -0,0 +1,20 @@
+function deepEquals(obj1,obj2)
+{
+    var keys1 = [];
+    for(var key1 in obj1) keys1.push(key1);
+    console.log(keys1)
+
+    var keys2 = [];
+    for(var key2 in obj2) keys2.push(key2);
+    console.log(keys2)
+
+    if (JSON.stringify(keys1) === JSON.stringify(keys2)) return true;
+    else return false;
+}
+
+var a = {"letter":"A","num":42};
+var b = {"letter":"B","num":73};
+var clone = {"letter":"A","num":42};
+
+console.log(deepEquals(a,b));
+console.log(deepEquals(a,clone));
\ No newline at end of file
diff --git a/objetos_arrays/intervalos.js b/objetos_arrays/intervalos.js
new file mode 100644
index 0000000..c1a8eaf
--- /dev/null
+++ b/objetos_arrays/intervalos.js
@@ -0,0 +1,11 @@
+function range(min,max)
+{
+    let inter= max - min;
+    const vet = [];
+    for (i = 1; i < inter; i++)
+    {
+        vet.push(min+i);
+    }
+    return vet;
+}
+console.log(range(2,8));
\ No newline at end of file
diff --git a/objetos_arrays/list.js b/objetos_arrays/list.js
new file mode 100644
index 0000000..627c013
--- /dev/null
+++ b/objetos_arrays/list.js
@@ -0,0 +1,32 @@
+function toList(array, len)
+{
+    var list = {
+        value: 0,
+        rest: null,
+    };
+    for (i=0;i<len;i++)
+    {
+        if(i == 0)
+        {
+            list.value = array[i];
+            list.rest = null;
+        }
+        else
+        {
+            var aux = list;
+            while(aux.rest != null)
+            {
+                aux = aux.rest;
+            }
+            var elem = {
+                value: array[i],
+                rest: null,
+            };
+            aux.rest = elem;
+        }
+    }
+    return list;
+}
+const test = ["artur", "gonzaga", "da", "silva", "gomes"];
+var aa = toList(test, test.length);
+for(aux = aa; aux.rest != null; aux = aux.rest) console.log(aux);
\ No newline at end of file
diff --git a/objetos_arrays/rev_array.js b/objetos_arrays/rev_array.js
new file mode 100644
index 0000000..cd88f60
--- /dev/null
+++ b/objetos_arrays/rev_array.js
@@ -0,0 +1,6 @@
+function reverseArray(array)
+{
+    return array.reverse();
+}
+const param = ["artur","gonzaga"];
+console.log(reverseArray(param));
\ No newline at end of file
diff --git a/objetos_arrays/variacao.js b/objetos_arrays/variacao.js
new file mode 100644
index 0000000..7a32647
--- /dev/null
+++ b/objetos_arrays/variacao.js
@@ -0,0 +1,11 @@
+function range(min,max,i)
+{
+    let inter= max - min;
+    const vet = [];
+    for (j = 1; j < inter; j+=i)
+    {
+        vet.push(min+j);
+    }
+    return vet;
+}
+console.log(range(2,8,2));
\ No newline at end of file