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Ada is a statically typed, structured language designed for reliability, maintainability, and safety-critical systems such as avionics, rail, defense, and space software. It emphasizes strong typing, range and constraint checking, modular packages, and built-in support for concurrency through tasks. Ada's verbose, readable syntax and strict compile-time checks help catch errors early, which is why it is favored in domains where failures are costly.
On CompileBytes, Ada programs are compiled with GNAT, the GNU Ada compiler, reported as version 12.2.0. GNAT is part of the GCC family and implements modern Ada standards. The online environment is well suited to learning the language's package structure, strong typing, and procedure/function declarations, letting you compile and run console programs without installing the GNAT toolchain or GNAT Studio locally.
main.adb is the entry point for each run.
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with Ada.Text_IO; use Ada.Text_IO;
procedure Main is
begin
Put_Line ("Hello, World!");
end Main;with Ada.Text_IO; use Ada.Text_IO;
procedure Main is
function Square (X : Integer) return Integer is
begin
return X * X;
end Square;
begin
Put_Line (Integer'Image (Square (7)));
end Main;with Ada.Text_IO; use Ada.Text_IO;
procedure Main is
Total : Integer := 0;
begin
for I in 1 .. 5 loop
Total := Total + I;
end loop;
Put_Line ("Sum:" & Integer'Image (Total));
end Main;with Ada.Text_IO; use Ada.Text_IO;
with Ada.Integer_Text_IO; use Ada.Integer_Text_IO;
procedure Main is
N : Integer;
begin
Put_Line ("Enter a number:");
Get (N);
Put_Line ("Doubled:" & Integer'Image (N * 2));
end Main;with Ada.Text_IO; use Ada.Text_IO;
procedure Main is
Score : constant Integer := 75;
begin
if Score >= 90 then
Put_Line ("A");
elsif Score >= 70 then
Put_Line ("B");
else
Put_Line ("C");
end if;
end Main;with Ada.Text_IO; use Ada.Text_IO;
procedure Main is
type Int_Array is array (1 .. 5) of Integer;
A : constant Int_Array := (1, 2, 3, 4, 5);
begin
for I in A'Range loop
Put_Line (Integer'Image (A (I) * A (I)));
end loop;
end Main;with Ada.Text_IO; use Ada.Text_IO;
procedure Main is
type Point is record
X : Integer;
Y : Integer;
end record;
P : constant Point := (X => 3, Y => 4);
begin
Put_Line (Integer'Image (P.X) & "," & Integer'Image (P.Y));
end Main;with Ada.Text_IO; use Ada.Text_IO;
procedure Main is
N : Integer := 1;
Fact : Integer := 1;
begin
while N <= 5 loop
Fact := Fact * N;
N := N + 1;
end loop;
Put_Line ("5! =" & Integer'Image (Fact));
end Main;with Ada.Text_IO; use Ada.Text_IO;
procedure Main is
type Day is (Mon, Tue, Wed, Thu, Fri);
D : constant Day := Wed;
begin
Put_Line (Day'Image (D));
Put_Line ("Next:" & Day'Image (Day'Succ (D)));
end Main;The editor uses Monaco, the engine behind VS Code, with language-aware editing tools and familiar keyboard controls.
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Ada is one of 46 single-file compiler scratchpads. Each run submits only main.adb; local sibling-file imports are not enabled.
Linked-project languages (23): Node.js, TypeScript, Deno, Python, C, Go, Dart, Swift, Rust, Ruby, PHP, Java, Kotlin, C++, C#, Nim, Crystal, Haxe, Zig, Scala, D, Bun, Objective-C.
Single-file scratchpads (46): Matplotlib, NumPy, pandas, Haskell, Clojure, Perl, Lua, Tcl, jq, Raku, Elixir, Bash, Zsh, Nushell, R, Assembly (NASM), Julia, Octave, Groovy, PowerShell, Visual Basic .NET, Odin, Pascal, Lisp, Erlang, CoffeeScript, COBOL, BASIC, V, Racket, OCaml, Prolog, AWK, Emacs Lisp, Emojicode, Forth, F#, Fortran, Assembly (NASM64), Solidity, Mojo, Ada, WASM (WAT), Gleam, Shell Script (sh), Scheme.
Download file exports the active Ada source file.