Variable_assignment

problems/variables.js

@@ -6,6 +6,11 @@
 //  * 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.
+const age = 1978;
+const futureYear = 2032;
+let ageMax = furtureYear - age;
+let ageMin = ageMax - 1;
+console.log("I will be either " + ageMin + " or " + ageMax + " in " futureYear);
 
 // ## Problem Two
 
@@ -15,6 +20,13 @@
 //  * 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`".
+let age = 28;
+const maxAge = 35;
+let snackAmount = 2;
+let snackNumber = snackAmount * 365;
+let snackYear = maxAge - age;
+let totalSnack = snackYear * snackNumber;
+console.log('You will need ' + totalSnack + ' tolast you until the age of ' + maxAge);
 
 // ## Problem Three
 
@@ -23,6 +35,11 @@
 //  * 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`".
 //  * Hint: https://www.w3schools.com/jsref/jsref_pi.asp
+let radius = 12;
+let circumference = 2 * Math.PI * radius;
+console.log('The circumference is ' + circumference);
+let areaOfCircle = Math.PI * radius ** 2;
+console.log('The area is ' + areaOfCircle);
 
 // ## Problem Four
 
@@ -31,6 +48,13 @@
 //  * Convert it to fahrenheit and output "`tempInCelsius`°C is `tempInFahrenheit`°F".
 //  * Now store a fahrenheit temperature into a variable.
 //  * Convert it to celsius and output "`tempInFahrenheit`°F is `tempInCelsius`°C."
+let tempInCelsius = 28;
+let tempInFahrenheit = (tempInCelsius * 9/5) + 32;
+console.log(tempInCelsius + ' ºC is ' + tempInFahrenheit + ' ºF');
+let tempInFahrenheit2 = 82.4;
+let tempInCelsius2 = (tempInFahrenheit2 -32) * 5/9;
+console.log.apply(tempInFahrenheit2 + ' ºF is ' + tempInCelsius2 + ' ºC');
+
 
 
 // ## Problem Five
@@ -43,6 +67,13 @@
 //  * Store Dee's grade on a test to a variable
 //  * Find the average grade of all students
 //  * Print out if Dee's grade is higher than the class average
+let aliceGrade = 98;
+let bobGrade = 88;
+let camGrade = 78;
+let avgGrade = (aliceGrade + bobgrade + camGrade) / 3;
+let deeGrade = 68;
+let avgAll = (aliceGrade + bobGrade + camGrade + deeGrade / 4);
+console.log(deeGrade + ' is lower than ' + avgAll);
 
 // ## Problem Six
 
@@ -56,6 +87,8 @@
 
 // Hint:
 // Use the remainder % operator.
+let a = 522;
+console.log(a % 5);
 
 
 // ## Problem Seven
@@ -81,6 +114,11 @@
 // * Hint:
 // * alice + x = y * (bob + x)
 // * Solve for alice
+let x = 12;
+let y = 2;
+let bob = 12;
+let alice = (bob + x) * y - x;
+console.log(alice);
 
 // ## Problem Eight
 
@@ -94,6 +132,13 @@
 // * Output:
 // * 25% of the daycare animals are cats
 // * 75% of the daycare animals are dogs
+let numberOfCats = 12;
+let numberOfDogs = 24;
+let totalAnimals = numberOfCats + numberOfDogs;
+let percentageOfCat = Math.floor(numberOfCats * 100 / totalAnimals);
+let percentageOfDog = Math.floor(numberOfDogs * 100 / totalAnimals);
+console.log(percentageOfDog + ' % of the daycare amimals are dogs');
+console.log(percentageOfCat + ' % of the daycare animals are cats');
 
 // ## Problem Nine
 
@@ -105,7 +150,9 @@
 // * The above rule is valid except that every 100 years special rules apply. 
 // * Years that are divisible by 100 are not leap years if they are not also divisible by 400. 
 // * For example 1900 was not a leap year, but 2000 was. Print "Leap year!" or "Not a leap year!" depending on the year you are provided.
-
+let leapYear = 3258;
+let isLeapYear = leapYear % 4 && (leapYear % 100 && leapYear % 400);
+console.log(isLeapYear === 0 && 'Leap Year!') || isLeapYear !== 0 && 'Not a leap year!');
 
 // ## Problem Ten: Predict the output
 
@@ -116,22 +163,23 @@
 //     let num1 = 2
 //     let num2 = 5
 //     let num3 = num1 * num2
-//     console.log(num3)
+//     console.log(num3) // 10
 //     ```
 
 // b. 
 //     ```js
 //     let str = 'jel' 
 //     str += 'lo'
-//     console.log(str)
+//     console.log(str) // 'jello'
 //     ```
 
 // c. 
 //     ```js
 //     let string =  'My favorite number is ';
 //     let number = 42
 //     let sentence = string + number
-//     console.log(typeof(sentence))
+//     console.log(typeof(sentence)) // string ('My favorite number is 42')
 //     ```
 
 
+