for(let i = 0; i < 1; i++) {
    alert(i);
}
alert(i);

for(var i = 0; i < 1; i++) {
    alert(i);
}
alert(i);
//# sourceMappingURL=test.js.map

"scripts": {
    "start": "tsc && concurrently "npm run tsc:w" "npm run lite" ",
    "lite": "lite-server",
    "postinstall": "typings install",
    "tsc": "tsc",
    "tsc:w": "tsc -w",
    "typings": "typings"
  },

for(let i = 0; i < 1; i++) {
    alert(i);
}
alert(i); // compile error: cannot find name 'i'

for (let i = 0; i < 3; i++) {
  setTimeout(function() { alert(i); });
}

function theDifference(){
    for(let emre = 0; emre < 10; emre++){
    // emre is only visible inside of this for()
    }

// emre is NOT visible here.
}

function theDifference(){
    for(var emre = 0; emre < 10; emre++){
    // emre is visible inside of this for()
    }

// emre is visible here too.
}

console.log('not defined = ' + notDefinedIsLegal);
var notDefinedIsLegal;

console.log('mustBeDefined = '+ mustBeDefinedBeforeUse);
let mustBeDefinedBeforeUse = 'Hello World';

console.log('not defined = ' + notDefinedIsLegal);
var notDefinedIsLegal : string;

let mustBeDefinedBeforeUse = 'Hello World';
console.log('mustBeDefined = '+ mustBeDefinedBeforeUse);

{
    var notDefinedIsLegal = "legal!";
    let mustBeDefinedBeforeUse = "Goodbye World!!";
    console.log('[blockscoped] mustBeDefined = '+ mustBeDefinedBeforeUse);
    console.log('[blockscoped] notDefinedIsLegal = ' + notDefinedIsLegal);
}

console.log('mustBeDefined = '+ mustBeDefinedBeforeUse);
console.log('notDefinedIsLegal = '+ notDefinedIsLegal);

not defined = undefined
mustBeDefined = Hello World
[blockscoped] mustBeDefined = Goodbye World!!
[blockscoped] notDefinedIsLegal = legal!
mustBeDefined = Hello World
notDefinedIsLegal = legal!