Converting natural numbers (decimal) to octal and hexadecimal & the Fibonacci array
To convert a natural number (decimal) to octal or hexadecimal, pass the base you want as the argument to the toString() function.
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const NUM = 250;
NUM.toString(2~36)If toString() is given a radix that isn't between 2 and 36, a RangeError is thrown.
For details, see https://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Global_Objects/Number/toString
Number.prototype.toString() - JavaScript | MDN
Next, I learned about the Fibonacci array. A Fibonacci array is an array where each number is the sum of the two numbers right before it.
An example of a Fibonacci array
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[0, 1, 1, 2, 3, 5, 8, 13, 21, 34]I used a loop to get the value at the n-th position given as the parameter. Below is how I solved it.
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function fib(n){ //create function fib and take n as the parameter / assume n is 5
First, create result, a fixed array object
const result = [0,1];
for(let i=2; i<=n; i++){
const a = result[i-2]; // store the value two indexes before result[i] in a variable named a
const b = result[i-1]; // store the value one index before result[i] in a variable named b
result.push(a+b); // insert the sum of a+b at the end of the result array result = [0,1,1,2,3,5]
}
return result[n-1] // return the 5th value in the result array (-1 because array indexes start at 0)
}- #Decimal Conversion
- #Loops
- #Fibonacci Sequence
