Here's a friendly walkthrough of how challenges on Praxide work. In the Code tab you'll find a starter function that looks like this: def hello() end All you need to do is type return "hello praxide.com" on the second line and then click the Check button. When you get it right, the button will turn red and read SUBMIT FINAL. Cl …

Write a function that receives a number as its argument, bumps that number up by +1 and returns the new value. Examples addition(0) ➞ 1 addition(9) ➞ 10 addition(-3) ➞ -2 Notes Remember to return your result. Stuck on a challenge? Find hints in the Resources tab. If you're truly stuck, unlock answers in the So …

Write a function that receives two numbers as its arguments and returns their total. Examples addition(3, 2) ➞ 5 addition(-3, -6) ➞ -9 addition(7, 3) ➞ 10 Notes Remember to return your result. If a challenge trips you up, find hints in the Resources tab. If you're truly stuck, unlock answers in the Solutions tab.

Build a function that receives a whole number of minutes and returns the equivalent count in seconds. Examples convert(5) ➞ 300 convert(3) ➞ 180 convert(2) ➞ 120 Notes Remember to send back your answer. Feeling stuck on this one? Grab a hint from the Resources tab. Truly stuck? Reveal the answer in the Solutions tab.

Build a function that receives an array made up entirely of numbers and hands back its very first element. Examples getfirstvalue([1, 2, 3]) ➞ 1 getfirstvalue([80, 5, 100]) ➞ 80 getfirstvalue([-500, 0, 50]) ➞ -500 Notes The opening element of any array always sits at index 0.

Build a function whose single argument is a number and that gives back true when the value is less than or equal to zero, and false in every other case. Examples lessthanorequalto_zero(5) ➞ false lessthanorequalto_zero(0) ➞ true lessthanorequalto_zero(-2) ➞ true Notes Remember to send back your answer. Feeling stuck on this cha …

Build a function that receives an age measured in years and returns that same age counted in days. Examples calc_age(65) ➞ 23725 calc_age(0) ➞ 0 calc_age(20) ➞ 7300 Notes Treat every year as exactly 365 days for this task. Skip leap years and any days between the last birthday and today. Assume only positive integer inputs.

Repair the code in the code tab so it clears this challenge (the only issues are syntax errors). Study the examples below to understand what the function is meant to accomplish. Examples squared(5) ➞ 25 squared(9) ➞ 81 squared(100) ➞ 10000 Notes READ EVERY WORD CAREFULLY, CHARACTER BY CHARACTER! Don't overthink this one; it isn't meant to be …

Build a function that receives the base and height of a triangle and returns the area of that triangle. Examples tri_area(3, 2) ➞ 3 tri_area(7, 4) ➞ 14 tri_area(10, 10) ➞ 50 Notes The area of a triangle equals: (base * height) / 2 Remember to send back your answer. Feeling stuck on this challenge? Grab a hint in the Resources …

Build a function that receives a voltage and a current, then returns the power it produces. Examples circuit_power(230, 10) ➞ 2300 circuit_power(110, 3) ➞ 330 circuit_power(480, 20) ➞ 9600 Notes Needs a little basic electrical circuit math (peek at Resources if you need a refresher).

Write a function that glues the string "something" to the given argument a with a single space " " sitting in between. Examples givemesomething("is better than nothing") ➞ "something is better than nothing" givemesomething("Bob Jane") ➞ "something Bob Jane" givemesomething("something") ➞ "something something" Notes You can assume an input is always provided.

Create a function that works out the largest possible length for a triangle's third edge, given that all of the side lengths are integers. Examples next_edge(8, 10) ➞ 17 next_edge(5, 7) ➞ 11 next_edge(9, 2) ➞ 10 Notes (side1 + side2) - 1 = maximum range of third edge. The side lengths of the triangle are positive integers. Don't forget to retu …

Write a function that turns a number of hours into the matching number of seconds. Examples howmanyseconds(2) ➞ 7200 howmanyseconds(10) ➞ 36000 howmanyseconds(24) ➞ 86400 Notes 60 seconds in a minute, 60 minutes in an hour Don't forget to return your answer.

Create a function that takes an array and hands back the very last item sitting inside it. The array may be homogeneous or heterogeneous. Examples getlastitem([1, 2, 3]) ➞ 3 getlastitem(["cat", "dog", "duck"]) ➞ "duck" getlastitem([true, false, true]) ➞ true getlastitem([7, "String", false]) ➞ false Notes Don't forget to r …

Create a function that takes the count of wins, draws and losses and works out how many points a football team has piled up so far. wins get 3 points draws get 1 point losses get 0 points Examples football_points(3, 4, 2) ➞ 13 football_points(5, 0, 2) ➞ 15 football_points(0, 0, 1) ➞ 0 Notes Inputs will be numbers …

In Ruby, the logical operator && (which you can also spell out as and) joins two conditions together. Give && two boolean values and it hands back true only when both of them are true. Picture a && b: first a is tested to see if it is true or false. If a is false, then false is returned. Next b is tested. If b is false, then false is returned. Otherwise, tru …

Keep score for a basketball match: given how many 3-pointers were made and how many 2-pointers were made, work out the team's final total and return that value (2-pointers scored, 3-pointers scored). Examples points(1, 1) ➞ 5 points(7, 5) ➞ 29 points(38, 8) ➞ 100 Notes If you ever feel stuck on a challenge, look for a hint in …

Write a function that receives a base number and an exponent number, then hands back the finished calculation. Examples calculate_exponent(5, 5) ➞ 3125 calculate_exponent(10, 10) ➞ 10000000000 calculate_exponent(3, 3) ➞ 27 Notes Every test input will be a positive integer. Remember to return your result. If you feel stuck on a challenge …

You are handed two strings, firstname and lastname; give back one combined string shaped like "last, first". Examples concat_name("First", "Last") ➞ "Last, First" concat_name("John", "Doe") ➞ "Doe, John" concat_name("Mary", "Jane") ➞ "Jane, Mary" Notes Remember to return your result. If you get stuck on a challenge, look for help in th …

Build a function that gives back 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 your result.