Solving freeCodeCamp's Algorithm Challenges (37 Part Series)
Original post can be found on my website, https://virenb.cc/fcc001convertcelsius
function convertToF(celsius) {
let fahrenheit;
return fahrenheit;
}
convertToF(30);
// TESTS
// convertToF(0) should return a number
// convertToF(30) should return a value of 22
// convertToF(10) should return a value of 14
// convertToF(0) should return a value of 32
// convertToF(20) should return a value of 68
// convertToF(30) should return a value of 86
Above is the starting code provided for Algorithm Scripting challenge, "Convert Celsius to Fahrenheit".
Our goal is to write a function that will take in a Celsius value (provided) and output the Fahrenheit value of that given temperature. Let's think this through. Here is how I would aim to solve this problem.
Method

Read (!)
 Read the instructions first. Make sure you understand what it being asked of you.
 Read the starter code. Go line by line, just making sure you know what is going on initially.
 Have a look at the tests. If the problem isn't clear to you, looking at the tests might give you an inclination of what kind of output you should aim for (i.e. instead of returning an array, maybe the problem is only asking for an index within the array).

Think & Write
Now that you've read through the instructions, starter code, and tests, it's time to analyze what to do and in what order. It may be handy to write out pseudocode.

Code
Once you've thought about what you'd like to do, and in what order, start to convert your pseudocode into JavaScript code.
There's been too many times where I've tried to jump write into writing the code without thinking it through (in projects and coding challenges). That will leave you testing it way too many times, creating unnecessary variables, and running into more problems then you need to handle. If I try to follow the above method, it leaves me with a more clear mind of what I'm doing and hopefully writing some DRY code. Let's try to solve this problem now.
Thoughts
 We're given the formula we need to convert Celsius to Fahrenheit in the instructions (Celsius * 9/5 + 32)
 The argument is the the Celsius temperature
 In the code, on line 2, they've provided a variable for us,
let fahrenheit;
 Let us assign the conversion formula to the
fahrenheit
variable  The next line (line 3) returns the
fahrenheit
variable so we know this function will return something
Solution
[SPOILER: SOLUTION TO CODE BELOW]
function convertToF(celsius) {
let fahrenheit = (celsius * 9 / 5) + 32;
return fahrenheit;
}
Alternative Solutions
// Without declaring a fahreinheit variable
function convertToF(celsius) {
return celsius * 9/5 + 32;
}
// ES6 Solution, using an arrow function
const convertToF = celsius => celsius * 9/5 + 32;
These solutions are little shorter and less verbose.
Links & Resources
Convert Celsius to Fahrenheit Challenge on FCC
Thank you for reading!
Solving freeCodeCamp's Algorithm Challenges (37 Part Series)
Discussion