atoday.log

var a= 10;
var b = 20;
var c = a+ b;
console.log('Sum is ',c);
setTimeout(function(){
console.log('I will call after 5 sec ');
},5000);
console.log('I am end ');
VM355:4 Sum is  30
VM355:8 I am end 
undefined
VM355:6 I will call after 5 sec 
var a= 10;
var b = 20;
var c = a+ b;
console.log('Sum is ',c);
setTimeout(function(){
document.write('I will call after 5 sec ');
},5000);
console.log('I am end ');
VM385:4 Sum is  30
VM385:8 I am end 
undefined
function iamAsync(){
setTimeout(function(){
console.log("I am After 5 Sec Going to Return ");
return "I am The Result of Async ";
//document.write('I will call after 5 sec ');
},5000);
}
var a= 10;
var b = 20;
var c = a+ b;
console.log('Sum is ',c);
var x = iamAsync();
console.log('x is ',x);

VM648:11 Sum is  30
VM648:13 x is  undefined
undefined
VM648:3 I am After 5 Sec Going to Return 
function giveMeResult(result){
console.log(" I am the Result ",result);
}
function iamAsync(fn){
setTimeout(function(){
console.log("I am After 5 Sec Going to Return ");
fn("I am the Result of Async"); // I am Calling the CallBack
//return "I am The Result of Async ";
//document.write('I will call after 5 sec ');
},5000);
}
var a= 10;
var b = 20;
var c = a+ b;
console.log('Sum is ',c);
//var x = iamAsync();
iamAsync(giveMeResult);
console.log('Last Line');

VM937:15 Sum is  30
VM937:18 Last Line
undefined
VM937:6 I am After 5 Sec Going to Return 
VM937:2  I am the Result  I am the Result of Async
function fail(err){
console.log(" I am Fail Error ",err);
}
function giveMeResult(result){
console.log(" I am the Result ",result);
}
function iamAsync(fn){
var a = 10;
setTimeout(function(){
console.log("I am After 5 Sec Going to Return ");
if(a>10){
fn("I am the Result of Async"); // I am Calling the CallBack
}
else{
//return "I am The Result of Async ";
//document.write('I will call after 5 sec ');
},5000);
}
var a= 10;
var b = 20;
var c = a+ b;
console.log('Sum is ',c);
//var x = iamAsync();
iamAsync(giveMeResult);
console.log('Last Line');

VM1051:17 Uncaught SyntaxError: Unexpected token ','
function fail(err){
console.log(" I am Fail Error ",err);
}
function giveMeResult(result){
console.log(" I am the Result ",result);
}
function iamAsync(success,fail){
var a = 10;
setTimeout(function(){
console.log("I am After 5 Sec Going to Return ");
if(a>10){
success("I am the Result of Async"); // I am Calling the CallBack
}
else{
fail("Some Error Occur ");
}
//return "I am The Result of Async ";
//document.write('I will call after 5 sec ');
},5000);
}
var a= 10;
var b = 20;
var c = a+ b;
console.log('Sum is ',c);
//var x = iamAsync();
iamAsync(giveMeResult);
console.log('Last Line');

VM1127:24 Sum is  30
VM1127:27 Last Line
undefined
VM1127:10 I am After 5 Sec Going to Return 
VM1127:15 Uncaught TypeError: fail is not a function
    at <anonymous>:15:1
(anonymous) @ VM1127:15
setTimeout (async)
iamAsync @ VM1127:9
(anonymous) @ VM1127:26
function fail(err){
console.log(" I am Fail Error ",err);
}
function giveMeResult(result){
console.log(" I am the Result ",result);
}
function iamAsync(success,fail){
var a = 10;
setTimeout(function(){
console.log("I am After 5 Sec Going to Return ");
if(a>10){
success("I am the Result of Async"); // I am Calling the CallBack
}
else{
fail("Some Error Occur ");
}
//return "I am The Result of Async ";
//document.write('I will call after 5 sec ');
},5000);
}
var a= 10;
var b = 20;
var c = a+ b;
console.log('Sum is ',c);
//var x = iamAsync();
iamAsync(giveMeResult, fail);
console.log('Last Line');

VM1161:24 Sum is  30
VM1161:27 Last Line
undefined
VM1161:10 I am After 5 Sec Going to Return 
VM1161:2  I am Fail Error  Some Error Occur 
var a = "100+ 200-10";
undefined
eval(a)
290
var a = "100+ 200*10";
undefined
a;
"100+ 200*10"
eval(a)
2100