Data commit

Task/Middle-three-digits/Julia/middle-three-digits.julia

@@ -0,0 +1,14 @@
+using Printf
+
+function middle3(n::Integer)
+    l = ndigits(n)
+    iseven(l) && error("n must have an odd number of digits")
+    l < 3 && error("n must have 3 digits or more")
+    mid = (l + 1) ÷ 2
+    abs(n) ÷ 10^(mid-2) % 10^3
+end
+
+for n = [123, 12345, 1234567, 987654321, 10001, -10001, -123,
+         -100, 100, -12345, 1, 2, -1, -10, 2002, -2002, 0]
+    @printf("%10d -> %s\n", n, try middle3(n) catch e e.msg end)
+end