diff --git a/fatemeh/JS/Basic_Syntax.js b/fatemeh/JS/Basic_Syntax.js
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+// add number a to b
+function add(a, b) {
+ return a + b;
+}
+
+// flip a coin and log the result (head or tail)
+function flipACoin() {
+ let num = Math.floor(Math.random() * 2);
+
+ switch (num) {
+ case 0:
+ return "head";
+ case 1:
+ return "tail";
+ }
+}
+
+// concat two strings
+function concat(stringA, stringB) {
+ return stringA.concat(stringB);
+}
+
+// 2^x = ?
+function power2(x) {
+ return x * x;
+}
+
+// user object with first name and last name, both capitalized
+// e.g. getUser('hello', 'world') is { firstName: 'Hello', lastName: 'World' }
+function getUser(firstName, lastName) {
+ const newFirstName = firstName
+ .slice(0, 1)
+ .toUpperCase()
+ .concat(firstName.slice(1).toLowerCase());
+ const newLastName = lastName
+ .slice(0, 1)
+ .toUpperCase()
+ .concat(lastName.slice(1).toLowerCase());
+
+ return newFirstName, newLastName;
+}
+
+// greet someone!
+// e.g. greet('ConnecMent') is "Hello, ConnecMent! Hope you the best."
+function greet(name) {
+ return "Hello, ".concat(name, "! Hope you the best.");
+}
+
+// get array of n random numbers
+function getNRandomNumbers(n) {
+ const resultArr = [];
+ for (let i = 0; i < n; i++) {
+ resultArr[i] = Math.floor(Math.random() * 100);
+ }
+
+ return resultArr;
+}
+
+// get sorted array of n random numbers, in range min to max
+function getNRandomNumbers(n, min, max) {
+ const resultArr = [];
+ for (let i = 0; i < n; i++) {
+ resultArr[i] = Math.floor(Math.random() * (max - min) + min);
+ }
+
+ return resultArr;
+}
+
+// log current time with a x seconds interval, for n seconds
+function logCurrentTime(x, n) {
+ let counter = 0;
+ let intervalID = setInterval(() => {
+ if (counter == n) {
+ clearInterval(intervalID);
+ } else {
+ console.log(Date());
+ counter += 1;
+ }
+ }, x * 1000); //this sets the speed of the animation
+}
+
+// higher order function: call the function in the parameters list
+// e.g. callFuncNTimes(flipACoin, 3) calls flipACoin 3 times
+function callFuncNTimes(func, n) {
+ for (let i = 0; i < n; i++) {
+ func(n);
+ }
+}
+
+// return true if parameter is false, false otherwise
+function isNil(param) {
+ if (param == true) {
+ return true;
+ } else {
+ return false;
+ }
+}
+
+// call property in object
+// e.g. in obj = { callableProp: function () { console.log('hello!') } }, callPropInObj(obj, 'callableProp') will log "hello!"
+function callPropInObj(object, propertyName) {
+ object[propertyName]();
+}
+
+// if the email is gmail
+function isGmail(email) {
+ if (email.match(/@gmail.com/i) == null) {
+ return false;
+ } else {
+ return true;
+ }
+}
+
+// duplicate array
+// e.g. duplicateArray([1,2,3]) is [1,2,3,1,2,3]
+function duplicateArray(Arr) {
+ let n = Arr.length;
+ for (let i = 0; i < n; i++) {
+ Arr.push(Arr[i]);
+ }
+}
diff --git a/fatemeh/JS/JS: data fetching + DOM manipulation/addpost.html b/fatemeh/JS/JS: data fetching + DOM manipulation/addpost.html
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