Using code, you can communicate with a computer. For a computer to perform particular functions, it must receive instructions in a language it understands. Using code, you can communicate with a computer. For a computer to perform particular functions, it must receive instructions in a language it understands. Using code, you can communicate with a computer. For a computer to perform particular functions, it must receive instructions in a language it understands. Using code, you can communicate with a computer. For a computer to perform particular functions, it must receive instructions in a language it understands.