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@extra-number/significant-digits

Counts the number of significant digits of a number.

Based on the solution provided by @Jos de Jong.
This is part of package extra-number.

number.significantDigits(n);
// n: a number

const number = require('extra-number');

number.significantDigits(0.0034);
// 2

number.significantDigits(120.5e50);
// 4

number.significantDigits(120.5e-50);
// 4

references

• What is the fastest way to count the number of significant digits of a number?