@@ -0,0 +1,62 @@
+'use strict'
+function validateCreditNumber(num) {
+    const array = [];
+    for(let i = 0; i < num.length; i++){
+        array.push(num[i]);
+    }
+
+    //At least two diffrent numbers should be represented
+    function similarity(array){
+            let firstItem = array[0]
+            let x = array.filter(elements => elements == firstItem).length != array.length ? false : true;
+            return x 
+        }
+
+        //The Sum of all the numbers must be greater than 16:
+        let sum = 0
+        const lastNum = array[array.length -1];
+        for (let i = 0; i < array.length; i++){
+                let arrayInt = parseInt(array[i])
+                sum += arrayInt
+            }
+
+    switch(true){
+
+        //The length of the number
+        case num.length !== 16:
+            console.log(`Invalid! The input ${num} should be 16 characters!`);
+            break;
+
+        //All characters must be numbers
+        case num.match(/^[0-9]+$/) == null:
+            console.log(`Invalid! The input ${num} should contain only numbers!`);
+            break;
+
+        //At least two diffrent numbers should be represented
+        case similarity(array) == true:
+            console.log(`Invalid! The input ${num} should contain at least 2 different types of numbers!`);
+            break;
+
+        //The last number must be even
+        case lastNum % 2 !== 0:
+            console.log(`Invalid! The last number of the  input ${num} should be even`);
+            
+            break;
+        
+        //The Sum of all the numbers must be greater than 16:
+        case sum < 16:
+            console.log(`Invalid! The sum of the input ${num} should be more than 16`);
+            break;
+
+        default:
+            console.log(`Success! The input ${num} is a valid credit card number!`)
+
+     };
+     
+};
+
+
+validateCreditNumber('66666666666561666');
+validateCreditNumber('a92332119c011112');
+validateCreditNumber('4444444444444441');
+validateCreditNumber('1111111111111110');