diff --git a/src/index.ts b/src/index.ts
index 4a4e871..124895f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -16,8 +16,8 @@ const INPUT = `
 extern mod std;
 
 function main() = (
-  std.pow(10, 2);
-);
+  std.printlnInt(10000);
+); 
 `;
 
 function main() {
diff --git a/std.nil b/std.nil
index 90a9d41..2692372 100644
--- a/std.nil
+++ b/std.nil
@@ -1,3 +1,48 @@
+function printlnInt(x: Int) = (
+  printInt(x);
+  print("\n");
+);
+
+function printInt(x: Int) = (
+  let mag = log10(x);
+
+  loop (
+    if mag == 0 then break;
+    let base = pow(10, mag);
+
+    let digit = x / base;
+    print(stringForDigit(digit));
+
+    x = x % base;
+    mag = mag - 1;
+  );
+
+  print(stringForDigit(x % 10));
+);
+
+function stringForDigit(x: Int): String = 
+  if x == 0 then "0"
+  else if x == 1 then "1"
+  else if x == 2 then "2"
+  else if x == 3 then "3"
+  else if x == 4 then "4"
+  else if x == 5 then "5"
+  else if x == 6 then "6"
+  else if x == 7 then "7"
+  else if x == 8 then "8"
+  else if x == 9 then "9"
+  else trap();
+
+function log10(x: Int): Int = (
+  let i = 0;
+  loop (
+    if x < 10 then break;
+    i = i + 1;
+    x = x / 10;
+  );
+  i
+);
+
 function pow(base: Int, exp: Int): Int = (
   let acc = 1;
   loop (
@@ -7,3 +52,8 @@ function pow(base: Int, exp: Int): Int = (
   );
   acc
 );
+
+function println(s: String) = (
+  print(s);
+  print("\n");
+);