From d1c3f6619b63d33db2bfb6ab08e3a1c99cf1f62d Mon Sep 17 00:00:00 2001
From: Sander Schobers <sander@schobers.eu>
Date: Fri, 12 Feb 2021 13:25:14 +0100
Subject: [PATCH] Added Len{,64} gives back the number of digits of a number.

---
 ints/statistics.go | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/ints/statistics.go b/ints/statistics.go
index d3bdbf6..3818b60 100644
--- a/ints/statistics.go
+++ b/ints/statistics.go
@@ -62,6 +62,28 @@ func IsPalindromic(n int) bool {
 	return true
 }
 
+// Len returns the number of digits of i (base 10, does not include a sign).
+func Len(i int) int {
+	return Len64(int64(i))
+}
+
+// Len64 returns the number of digits of i (base 10, does not include a sign).
+func Len64(i int64) int {
+	if i == 0 {
+		return 1
+	}
+	if i < 0 {
+		i = 0 - i
+	}
+
+	digits := 0
+	for i > 0 {
+		i /= 10
+		digits++
+	}
+	return digits
+}
+
 // Permutations returns all possible permutations of the the set integers.
 func Permutations(set []int) [][]int {
 	var n = len(set)