variable exercises js

Exercise 1:
Create a variable called `name` and assign it your name as a string. Then, write a line of code to log the value of `name` to the console.

let myName = "Rozi";
console.log(myName);

Exercise 2:
Create two variables called `num1` and `num2` and assign them any numeric values of your choice. Then, calculate the sum of the two numbers and assign it to a new variable called `sum`. Finally, log the value of `sum` to the console.

let num1 = 7;
let num2 = 3;
let sum = num1+num2;
console.log(sum);

Exercise 3:
Create a variable called `message` and assign it an empty string. Then, concatenate the strings "Hello," and " how are you?" to the `message` variable. Log the final message to the console.

let message = ""; // this is an empty string
message = "Hello, " + "how are you?";
console.log(message);

Exercise 4:
Create a variable called `radius` and assign it a numeric value representing the radius of a circle. Calculate the circumference of the circle (2 * π * radius) and assign it to a new variable called `circumference`. Log the value of `circumference` to the console.

let radius = 5,55;
let circumference = 2*3.14159265359*radius;
console.log(circumference);

Exercise 5:
Create a variable called `isRaining` and assign it a boolean value of `true` or `false`, depending on the current weather condition. Use an `if` statement to check if it's raining. If it is, log "Remember to take your umbrella!" to the console. If it's not raining, log "Enjoy the sunny day!".

let isRaining = 'true';

if isRaining === 'true' {
    console.log(Remember to take your umbrella!");
} else {
    console.log(Enjoy the sunny day!);
}