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lenoraporter / understand-var-let-and-const.txt
Created April 9, 2020 05:49
Const must be initialized upon declaration
const meg; //Uncaught SyntaxError: Missing initializer in const declaration
@lenoraporter
lenoraporter / understand-var-let-and-const.txt
Created April 9, 2020 05:43
Const can't be redeclared
const meganOnStage = "Hi, I'm Megan Thee Stallion."
const meganOnStage = "Hi, I'm Meg." // Uncaught SyntaxError: Identifier 'meganOnStage' has already been declared
@lenoraporter
lenoraporter / understand-var-let-and-const.txt
Last active April 9, 2020 05:25
Let can be updated in same scope
let ciara = "I'm engaged to Future.";
ciara = "My husband is Russell Wilson."
console.log(ciara); // My husband is Russell Wilson.
@lenoraporter
lenoraporter / understand-var-let-and-const.txt
Last active April 9, 2020 03:07
Const properties can be updated or mutated
const theeStallionProfile = {
name: "Megan Pette",
stageName: "Megan Thee Stallion",
situationShip: "MoneyBagYo",
pets: {
name: "4oe",
breed: "French Bulldog"
}
}
@lenoraporter
lenoraporter / understand-var-let-and-const.txt
Last active April 9, 2020 05:48
Const cannot be updated
const meganOnStage = "Hi, I'm Megan Thee Stallion."
meganOnStage = "Hi, I'm Meg." // Uncaught TypeError: Assignment to constant variable.
@lenoraporter
lenoraporter / understand-var-let-and-const.txt
Last active April 9, 2020 03:08
Let can be redeclared in a different scope
let ciara = "My husband is Russell Wilson.";
let currentYear = 2019;
if (currentYear <= 2015 && currentYear >= 2013) {
let ciara = "I'm in love with Future."
console.log(ciara);
}
console.log(ciara);
@lenoraporter
lenoraporter / understand-var-let-and-const.txt
Last active April 9, 2020 03:08
Let can be updated but not redeclared
let ciara = "My husband is Russell Wilson.";
let ciara = "I'm in love with Future." //Uncaught SyntaxError: Identifier 'ciara' has already been declared
@lenoraporter
lenoraporter / understand-var-let-and-const.txt
Last active April 9, 2020 03:08
Var can be redeclared and redefined :: Part 2
var beyonce = "Hi, I'm Beyonce Knowles.";
beyonce = "Hi, I'm Beyonce Carter.";
@lenoraporter
lenoraporter / understand-var-let-and-const.txt
Last active April 9, 2020 03:09
Var can be redeclared and redefined :: Part 1
var beyonce = "Hi, I'm Beyonce Knowles.";
var beyonce = "Hi, I'm Beyonce Carter.";
let sayLevelUp = "Level Up! ";
let times = 5;
if (times >= 1) {
let lyrics = sayLevelUp.repeat(times);
console.log(lyrics); // Level Up! Level Up! Level Up! Level Up! Level Up!
}
console.log(lyrics); // Uncaught ReferenceError: lyrics is not defined