Or use USB-A to USB-A cable with "Apple Lightning to USB 3 Camera Adapter"(sold from Apple separately) to connect iPad(2017) 5th Gen and above. 

----------USB-C interface----------

iPad Pro 3rd, 12.9"

iPad Pro 3rd, 11"

----------Lightning interface----------

iPad Pro 2nd, 12.9"

iPad Pro 2nd, 10.5"

iPad Pro 1st, 12.9"

iPad Pro 1st, 9.7"

iPad 5th generation

iPad 6th generation

iPad Air 3rd generation

iPad Mini 5th generation