"To be useful, a program usually needs to communicate with the outside world by obtaining input data from the user and displaying result data back to the user. This tutorial will introduce you to ...

We output information in Python using the **print** statement, which you've already seen a bit. This is called **string formatting**. That *%d* is a placeholder for where we want our value to go. The ...

Programs close programSequences of instructions for a computer. are written to solve problems. To solve a problem, a program needs data input and data, or information, output. Data can be input in ...

Most programs require data from the user. This is processed and the outcome is outputted or moved to secondary storage. In some languages the input and output is combined to form a single statement.