Divrem does not allocate

src/Julia/Problem030.jl

@@ -11,8 +11,12 @@ https://projecteuler.net/problem=30
 using BenchmarkTools
 
 function power_digit_sum(pow, n)
-    # return sum(c^pow for c in reverse(digits(n)))
+    s = 0
-    return sum(c->c^pow, digits(n))
+    while n > 0
+        (n, r) = divrem(n, 10)
+        s += r^pow
+    end
+    return s
 end
 
 function Problem30()