Quick Reference

phox echo "Hello World!" --repeat=12 -?
│    │    │                │          │
│    │    │                │          └─► short option (-<short>)
│    │    │                │
│    │    │                └────────────► long option with value (--<name>=<value>)
│    │    │
│    │    └─────────────────────────────► argument (<value>, "<value>", or '<value>')
│    │
│    └──────────────────────────────────► command
│
└───────────────────────────────────────► binary

• short options can be compounded: -a -b -c = -abc
• the last short option can have a value: -abc=1 = -a -b -c=1
• long options can function as flags if they have no value: --foo sets the value to true