Code to make a square symbol?

To create a square symbol in code, you can use Unicode characters. For example, in HTML, you can use ■ for a filled square (■) or □ for an empty square (□). In Python, you can print these characters directly using print("\u25A0") for a filled square or print("\u25A1") for an empty square. In any programming context that supports Unicode, you can simply insert the respective character directly.