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src/main/java/com/thealgorithms/maths/NumberOfDigits.java
53 строки
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marysiuniq
Added tests for NumberOfDigits (#5107)
13 апр 2024, 21:45
Не верифицирован
13 апр 2024, 21:45
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package com.thealgorithms.maths; /** * Find the number of digits in a number. */ public final class NumberOfDigits { private NumberOfDigits() { } /** * Find the number of digits in a number. * * @param number number to find * @return number of digits of given number */ public static int numberOfDigits(int number) { int digits = 0; do { digits++; number /= 10; } while (number != 0); return digits; } /** * Find the number of digits in a number fast version. * * @param number number to find * @return number of digits of given number */ public static int numberOfDigitsFast(int number) { return number == 0 ? 1 : (int) Math.floor(Math.log10(Math.abs(number)) + 1); } /** * Find the number of digits in a number faster version. * * @param number number to find * @return number of digits of given number */ public static int numberOfDigitsFaster(int number) { return number < 0 ? (-number + "").length() : (number + "").length(); } /** * Find the number of digits in a number using recursion. * * @param number number to find * @return number of digits of given number */ public static int numberOfDigitsRecursion(int number) { return number / 10 == 0 ? 1 : 1 + numberOfDigitsRecursion(number / 10); } }