Stack3web
diff --git a/‎09-An-Advanced-Look-at-Functions/01/01.js‎
Lines changed: 14 additions & 1 deletion b/‎09-An-Advanced-Look-at-Functions/01/01.js‎
Lines changed: 14 additions & 1 deletion
diff --git a/‎09-An-Advanced-Look-at-Functions/README.md‎
Lines changed: 8 additions & 1 deletion b/‎09-An-Advanced-Look-at-Functions/README.md‎
Lines changed: 8 additions & 1 deletion
@@ -322,6 +322,7 @@ pickOne(cry, rage)
 
 // Functions as Arguments ******************************
 // Example 21
+/*
 console.log('\n')
 function multiplyByNo1(num) {
   // Function expression, anonymous functiion
@@ -383,4 +384,16 @@ console.log(isInNineties(1992)) // true
 console.log('\n')
 const isNiceWeather = makeBetweenFunc(60, 79)
 console.log(isNiceWeather(45)) // false
-console.log(isNiceWeather(76)) // true
+console.log(isNiceWeather(76)) // true
+*/
+
+// Callbacks ******************************
+// Example 24
+/*
+console.log('\n')
+// after 5 seconds run the func
+// setTimeout(func, 5000);
+setTimeout(function () {
+  console.log('setTimeout, 2000');
+}, 2000);
+*/
@@ -190,4 +190,11 @@ const inAgeRange = makeBetweenFunc(18, 100);
 
 inAgeRange(17); // false
 inAgeRange(68); // true
-```
+```
+
+## 8. Callbacks
+A callback function is a function passed into another function as an argument, which is then invoked inside the outer function. So any time we pass a function to another function and it's executed in that function, we would call it a callback function
+
+**tons of the really useful built-in methods in JavaScript expect you to pass in a callback**
+
+Anonymous function: Sometimes we just need a one time use function, We don't need it to be a standalone function, in which case we use anonymous func