Merge pull request #82 from atarax665/number_of_digits

maths/number_of_digits.rb

@@ -0,0 +1,24 @@
+# Given a number, find number of digits in it.
+
+def count_digits(n)
+    count = 0
+    temp = n
+    
+    if (n == 0)
+        return 1
+    end
+    
+    until temp.zero?
+        count += 1
+        temp /= 10
+    end
+    
+    return count
+end
+
+puts "Number of digits in 8732 is " + count_digits(8732).to_s
+# Number of digits in 8732 is 4
+puts "Number of digits in 112233 is " + count_digits(112233).to_s
+# Number of digits in 112233 is 6
+puts "Number of digits in 0 is " + count_digits(0).to_s
+# Number of digits in 0 is 1