0007 added[Method chaining, if statements, switch statement, checkboxes, radiobuttons]

js/index.js

@@ -117,7 +117,7 @@ console.log(students);
 //console.log(username);
 //8.2 
 let username;
-document.getElementById("myButton").onclick = function() {
+document.getElementById("myButton").onclick = function () {
     username = document.getElementById("myText").value;
     console.log(username);
     document.getElementById("myLabel").innerHTML = username;
@@ -172,7 +172,7 @@ console.log(x);
 x = Math.ceil(7.1); //round number always up
 console.log(x);
 
-x = Math.pow(2,8); //pow(base, exponent) gives base to the power of exponent value
+x = Math.pow(2, 8); //pow(base, exponent) gives base to the power of exponent value
 console.log(x);
 
 x = Math.sqrt(9); //get squareroot of number
@@ -185,8 +185,8 @@ let c = 5;
 let d = 9;
 let max;
 let min;
-max = Math.max(c,d); //get maximum out of array with numbers
-min = Math.min(c,d); //get minimum out of array with numbers
+max = Math.max(c, d); //get maximum out of array with numbers
+min = Math.min(c, d); //get minimum out of array with numbers
 console.log(max);
 console.log(min);
 
@@ -226,4 +226,47 @@ console.log(lastName2);
 //--------------------------------------------------------------------------------------------------------------
 
 //14.Method chaining
-//https://youtu.be/8dWL3wF_OMw?t=3554
+//Chaining methods... 
+let userName3 = "bro";
+let letter = userName3.charAt(0).toUpperCase().trim();
+console.log(letter);
+//--------------------------------------------------------------------------------------------------------------
+
+//15.If-statements
+//Basic form of decission making, if the condition is true, something is done, else it is not done
+let age4 = 21;
+if (age4 >= 18) {
+    console.log("You're an adult!");
+} else if (age < 0) {
+    console.log("You havn't been born yet!");
+} else if (age >= 65) {
+    console.log("You are a senior citizen!");
+} else {
+    console.log("You're a child.");
+}
+//--------------------------------------------------------------------------------------------------------------
+
+//16.Switch-statement
+//Advanced form of decission-making, if case is true, something is done
+//examines a value for a match against many case clauses, more efficient, than many else ifs
+let grade = "A";
+switch (grade) {
+    case ("A"): {
+        console.log("Very Good Mr!");
+    } break;
+    case ("B"): {
+        console.log("Good Mr!");
+    } break;
+    case ("C"): {
+        console.log("Could be better.");
+    } break;
+    case ("D"): {
+        console.log("Troll!");
+    } break;
+    case ("F"): {
+        console.log("Idiot!");
+    } break;
+}
+//--------------------------------------------------------------------------------------------------------------
+
+//17.