a square code would be rectangular

This depends on the shape of the code. A standard barcode, however, has no borders and therefore, is very uniform. If a code were to have a border, its edges could be different shapes.

For example, a square code would be rectangular and a hexagon-shaped code could be circular. However, these edges would be subtle and don’t change the shape of the code.

So while it is possible to have a variety of QR Codes’ shapes, you QR code shapes will most likely not see them in real life, but you might find it helpful for certain business purposes.

However, there are certain applications where a QR Code’s shape is actually very important. For example, QR Codes with a square shape are better suited for a business logo. While a QR Code with a circle might be more effective for an individual’s signature on a legal document.

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