.
let birthYear = 1993; let futureYear = 2023; let ageMax = futureYear - birthYear; let ageMin = ageMax - 1;
console.log("I will be either " + ageMin + ' or ' + ageMax + ' in '+ futureYear);
let currentAge = 25; let maxAge = 73 let estSnack = 2; let ageDiff = maxAge - currentAge; let snackNumber = ageDiff * estSnack;
console.log(" You will need " + snackNumber + " snacks to last you until the age of " + maxAge);
let radius = 7 let circumferenceResult = Math.PI * 2 * radius;
console.log("The circumference is " + circumferenceResult );
let areaOfCircle = Math.PI * radius*radius;
console.log("The area is " + areaOfCircle )
let celsius = 21; let tempInCelsius = (celsius*9)/5 + 32;
console.log(celsius + '°C is ' + tempInCelsius + ' °F ');
let farenheit = 83
let tempInFarenheit = ((farenheit - 32)* 5)/9;
console.log(farenheit + '°F is ' + tempInFarenheit + '°C');
10
<!-- 6.
```js
let str = 'jel'
str += 'lo'
console.log(str) -->
jello
string