Pick a problem and start coding.
Return a greeting string — your first function.
Add two numbers together and return the result.
Return the characters of a string in reverse order.
Return "Even" or "Odd" for a given whole number.
Scan an array and return its biggest value.
Count how many vowels appear in a string.
Multiply every whole number from 1 up to n.
The classic interview warm-up: multiples of 3, 5 and 15.
Decide whether a phrase reads the same forwards and backwards.
Compute the mean of an array, rounded to two decimals.
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