Chapter 6: Problem 12

Write a short program that uses a for loop to write the numbers 1 through 10 to a file.

Short Answer

Expert verified

Question: Write a short Python program that uses a `for` loop to write the numbers 1 through 10 to a file, with each number on a separate line. Answer: ```python for i in range(1, 11): with open('numbers.txt', 'w') as file: file.write(str(i) + '\n') ```

Step by step solution

1. Choose a programming language

Select a suitable programming language for this task. In this example, we'll use Python, as it has simple and easy-to-understand syntax.

2. Initialize the for loop

A `for` loop allows you to repeatedly execute a block of code until a specified condition is satisfied. In this case, we want to iterate over the range of numbers from 1 to 10. Since Python's `range()` function is exclusive of the stopping value, we'll set the range from 1 to 11 (1 to 10, inclusive). ```python for i in range(1, 11): ```

3. Open or create the output file

To write the numbers to a file, you need to use Python's built-in `open()` function. This function creates a new file if the specified file doesn't already exist or opens an existing file. You'll also need to specify the file mode for writing to the file (`'w'`). ```python with open('numbers.txt', 'w') as file: ```

4. Write the numbers to the file

Inside the `for` loop and the context manager (provided by the `with` statement), write the current number (`i`) to the file. Remember to convert the number to a string format before writing. Also, add a newline character at the end of each number to ensure that each number appears on a separate line in the output file. ```python file.write(str(i) + '\n') ```

5. Combine the steps and run the program

Put everything together and run the completed program. Here's the final code: ```python for i in range(1, 11): with open('numbers.txt', 'w') as file: file.write(str(i) + '\n') ``` After executing the code, you'll find a file named "numbers.txt" containing the numbers 1 through 10, each on a separate line.

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Write a short program that uses a for loop to write the numbers 1 through 10 to a file.

Short Answer

Step by step solution

1. Choose a programming language

2. Initialize the for loop

3. Open or create the output file

4. Write the numbers to the file

5. Combine the steps and run the program

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