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geometricProgression javascript Code Snippet in 2023

mathalgorithmintermediate

Last Updated: 4 February 2023

Initializes an array containing the numbers in the specified range where start and end are inclusive and the ratio between two terms is step. Returns an error if step equals 1.

  • Use Array.from(), Math.log() and Math.floor() to create an array of the desired length, Array.prototype.map() to fill with the desired values in a range.
  • Omit the second argument, start, to use a default value of 1.
  • Omit the third argument, step, to use a default value of 2.
const geometricProgression = (end, start = 1, step = 2) => Array.from({ length: Math.floor(Math.log(end / start) / Math.log(step)) + 1, }).map((_, i) => start * step ** i);
geometricProgression(256); // [1, 2, 4, 8, 16, 32, 64, 128, 256] geometricProgression(256, 3); // [3, 6, 12, 24, 48, 96, 192] geometricProgression(256, 1, 4); // [1, 4, 16, 64, 256]

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