QByteArray byteArray = "Hello, World!"; if (byteArray.startsWith("Hello")) { qDebug() << "Byte array starts with 'Hello'"; }
QByteArray byteArray = "Hello, World!"; if (byteArray.startsWith(QByteArray::fromHex("48656c6c6f"))) { qDebug() << "Byte array starts with 'Hello' in hexadecimal format"; }This example creates a QByteArray with the string "Hello, World!" and converts the byte sequence "48656c6c6f" to a QByteArray using the fromHex function. It then checks if the original byte array starts with this hexadecimal byte sequence. If it does, it prints a debug statement confirming it. Package Library: Qt Core Module.