For this exercises we are going to create a file called variables.js. Copy the description of the exercise as a comment into the file and underneath write your JavaScript code.

1. Age Calculator:

   • Store your birth year in a variable.
   • Store a future year in a variable.
   • Calculate your 2 possible ages for that year based on the stored values.
   • For example, if you were born in 1988, then in 2026 you'll be either 37 or 38, depending on what month it is in 2026.
   • Log them to the screen like so: "I will be either ageMin or ageMax in futureYear", substituting the values.

2. Snack Supply Calculator:

   • Store your current age in a variable.
   • Store a maximum age in a variable.
   • Store an estimated snack amount per day (as a number).
   • Calculate how many snacks you would eat total, from your current age until the maximum age.
   • Log the result to the screen like this: "You will need snackNumber to last you until the age of maxAge".

3. Calculate properties of a circle, using the definitions here.

   • Use google: find how to get the number PI in JavaScript.
   • Store a radius into a variable.
   • Calculate the circumference based on the radius, and log "The circumference is circumferenceResult".
   • Calculate the area based on the radius, and log "The area is areaOfCircle".

4. Temperature Converter:

   • Store a celsius temperature into a variable.
   • Convert it to fahrenheit and output "tempInCelcius°C is tempInFahrenheit°F".
   • Now store a fahrenheit temperature into a variable.
   • Convert it to celsius and output "tempInFahrenheit°F is tempInCelcius°C."

For this section write what you think will be logged as a comment next to console.log like so: console.log('Cat') //'Cat' before running the code. Then execute your file and compare with your prediction.

5. let num1 = 2
   let num2 = 5
   let num3 = num1 * num2
   console.log(num3)

6. let str = 'jel' 
   str += 'lo'
   console.log(str)

7. let string =  'My favorite number is ';
   let number = 42
   let sentence = string + number
   console.log(typeof(sentence))