config control flow

Author: krish717

js_basics/control_flow.js

@@ -0,0 +1,128 @@
+// if
+// const isUserloggedIn = true
+// const temperature = 41
+
+// if ( temperature === 40 ){
+//     console.log("less than 50");
+// } else {
+//     console.log("temperature is greater than 50");
+// }
+
+// console.log("Execute");
+// <, >, <=, >=, ==, !=, ===, !==
+
+// const score = 200
+
+// if (score > 100) {
+//     let power = "fly"
+//     console.log(`User power: ${power}`);
+// }
+
+// console.log(`User power: ${power}`);
+
+
+// const balance = 1000
+
+// if (balance > 500) console.log("test"),console.log("test2");
+
+// if (balance < 500) {
+//     console.log("less than 500");
+// } else if (balance < 750) {
+//     console.log("less than 750");
+    
+// } else if (balance < 900) {
+//     console.log("less than 750");
+    
+// } else {
+//     console.log("less than 1200");
+
+// }
+
+// const userLoggedIn = true
+// const debitCard = true
+// const loggedInFromGoogle = false
+// const loggedInFromEmail = true
+
+// if (userLoggedIn && debitCard && 2==3) {
+//     console.log("Allow to buy course");
+// }
+
+// if (loggedInFromGoogle || loggedInFromEmail) {
+//     console.log("User logged in");
+// }
+
+
+
+// switch (key) {
+//     case value:
+        
+//         break;
+
+//     default:
+//         break;
+// }
+
+// const month = "march"
+
+// switch (month) {
+//     case "jan":
+//         console.log("January");
+//         break;
+//     case "feb":
+//         console.log("feb");
+//         break;
+//     case "march":
+//         console.log("march");
+//         break;
+//     case "april":
+//         console.log("april");
+//         break;
+
+//     default:
+//         console.log("default case match");
+//         break;
+// }
+
+const userEmail = []
+
+if (userEmail) {
+    console.log("Got user email");
+} else {
+    console.log("Don't have user email");
+}
+
+// falsy values
+
+// false, 0, -0, BigInt 0n, "", null, undefined, NaN
+
+//truthy values
+// "0", 'false', " ", [], {}, function(){}
+
+// if (userEmail.length === 0) {
+//     console.log("Array is empty");
+// }
+
+// const emptyObj = {}
+
+// if (Object.keys(emptyObj).length === 0) {
+//     console.log("Object is empty");
+// }
+
+// Nullish Coalescing Operator (??): null undefined
+
+let val1;
+// val1 = 5 ?? 10
+// val1 = null ?? 10
+// val1 = undefined ?? 15
+val1 = null ?? 10 ?? 20
+
+
+
+console.log(val1);
+
+// Terniary Operator
+
+// condition ? true : false
+
+const iceTeaPrice = 100
+iceTeaPrice <= 80 ? console.log("less than 80") : console.log("more than 80")