Here's a friendly walkthrough of how challenges on Praxide work. Open the Code tab above and you'll find a starter function that looks like this: bool returnTrue() { } Your only job is to type return true; between the curly braces { } and then hit the Check button. Nail it, and the button will turn red and show SUBMIT …

Write a function that accepts two numbers as arguments and hands back their total. Examples addition(3, 2) ➞ 5 addition(-3, -6) ➞ -9 addition(7, 3) ➞ 10 Notes Remember to return the result. Feeling stuck on a challenge? Grab a hint from the Resources tab. Still stuck? Unlock the answer in the Solutions tab.

Write a function that accepts a number as an argument, add one to that number, and hand back the result. Examples addition(0) ➞ 1 addition(9) ➞ 10 addition(-3) ➞ -2 Notes No need to test for overflow. Remember to return the result. Feeling stuck on a challenge? Grab a hint from the Resources tab. Still stuck? Unloc …

Build a function that receives an integer minutes and turns it into the matching number of seconds. Examples convert(5) ➞ 300 convert(3) ➞ 180 convert(2) ➞ 120 Notes Remember to return your value. Whenever a puzzle trips you up, grab a hint from the Resources tab. If it's still a mystery, reveal the answer in the Solutions tab.

Build a function that accepts the base and height of a triangle and gives back its area. Examples triArea(3, 2) ➞ 3 triArea(7, 4) ➞ 14 triArea(10, 10) ➞ 50 Notes The area of a triangle is: (base * height) / 2 Remember to return your value. Whenever a puzzle trips you up, grab a hint from the Resources tab. If it's still re …

Write a function that receives voltage and current and hands back the resulting power. Examples circuitPower(230, 10) ➞ 2300 circuitPower(110, 3) ➞ 330 circuitPower(480, 20) ➞ 9600 Notes Calls for a basic electrical-circuit calculation (check Resources for details).

Build a function that changes a count of hours into seconds. Examples howManySeconds(2) ➞ 7200 howManySeconds(10) ➞ 36000 howManySeconds(24) ➞ 86400 Notes 60 seconds in a minute, 60 minutes in an hour Remember to return your answer.

Write a function that works out the largest possible length of a triangle's third edge, given that every side length is a whole number. Examples nextEdge(8, 10) ➞ 17 nextEdge(5, 7) ➞ 11 nextEdge(9, 2) ➞ 10 Notes (side1 + side2) - 1 = maximum range of third edge. All side lengths of the triangle are positive integers. Remember to return …

C++ offers a single operator that gives you the remainder left over from a division. Your function is handed two numbers as parameters. Dividing the first parameter by the second leaves a remainder, which may well be zero. Send that value back. Examples remainder(1, 3) ➞ 1 remainder(3, 4) ➞ 3 remainder(-9, 45) ➞ -9 remainde …

Head over to the code tab and patch up the function so this challenge passes (only syntax errors). Peek at the samples underneath to picture exactly what the function should return. Examples squared(5) ➞ 25 squared(9) ➞ 81 squared(100) ➞ 10000 Notes READ EVERY WORD CAREFULLY, CHARACTER BY CHARACTER! Relax and trust the basics here; this one really isn't meant to be …

Write a function that accepts a length and a width and works out the perimeter of a rectangle. Examples findPerimeter(6, 7) ➞ 26 findPerimeter(20, 10) ➞ 60 findPerimeter(2, 9) ➞ 22 Notes Remember to return the result. Feeling stuck? Grab a hint from the Resources tab. Really stuck? Peek at the answers in the Solutions tab.

Build a function that accepts two integers and reports back whether they are equal. Examples isEqual(5, 6) ➞ false isEqual(1, 1) ➞ true isEqual(36, 35) ➞ false Notes N/A

Write a function whose only argument is a number and that returns true when that number is less than or equal to zero, and false in every other case. Examples lessThanOrEqualToZero(5) ➞ false lessThanOrEqualToZero(0) ➞ true lessThanOrEqualToZero(2) ➞ false Notes Remember to return the result. Whenever a challenge trips you up, find …

For this challenge, a farmer wants you to work out how many legs can be counted across his entire barnyard. He raises exactly three kinds of animals: chickens = 2 legs cows = 4 legs pigs = 4 legs After tallying up his herd, the farmer hands you a subtotal for each species. Your job is to build a function that returns the total nu …

Build a function that returns true whenever num1 is equal to num2, and returns false in every other case. Examples isSameNum(4, 8) ➞ false isSameNum(2, 2) ➞ true isSameNum(2, "2") ➞ false Notes Remember to return the result.

Build a function that flips a boolean value to its opposite. Examples reverse(true) ➞ false reverse(false) ➞ true Notes Remember to return your answer. Stuck on a problem? Grab a hint from the Resources tab. Totally stuck? Reveal the answer in the Solutions tab.

Repair the code in the Code tab so the function returns true only when x equals 7. Hunt down the bug and make every test pass. Examples isSeven(4) ➞ false isSeven(9) ➞ false isSeven(7) ➞ true Notes This sneaky bug is tricky to spot, so inspect it closely!

Take two numbers and return true when their combined total is below 100. If not, return false. Examples lessThan100(22, 15) ➞ true // 22 + 15 = 37 lessThan100(83, 34) ➞ false // 83 + 34 = 117 lessThan100(3, 77) ➞ true Notes N/A

Design a function that receives two integers (hours, minutes), turns each of them into seconds, and adds the two totals together. Examples convert(1, 3) ➞ 3780 convert(2, 0) ➞ 7200 convert(0, 0) ➞ 0 Notes Remember to return your answer. Stuck on a problem? Grab a hint from the Resources tab. If you're really stuck, reveal the solutions in the …

Build a function that takes a length given in inches and returns the matching length expressed in feet. Examples inchesToFeet(324) ➞ 27 inchesToFeet(12) ➞ 1 inchesToFeet(36) ➞ 3 Notes When the inches are below 12, return 0. 12 inches = 1 foot.