#includeThis code creates a QByteArray object with the value "abcdef". The left function is then called on this object with a value of 3, which returns a new byte array containing the first three bytes of the original array ("abc"). This new byte array is then printed to the console using qDebug(). Package library: Qt#include int main() { QByteArray byte_array = "abcdef"; QByteArray left_bytes = byte_array.left(3); qDebug() << left_bytes; return 0; }