711.2  Robbery in the first degree.
  A person commits robbery in the first degree when, while perpetrating a robbery, the person purposely inflicts or attempts to inflict serious injury, or is armed with a dangerous weapon. Robbery in the first degree is a class “B” felony.
[C51, §2579; R60, §4202; C73, §3859; C97, §4754; C24, 27, 31, 35, 39, §13039; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §711.2]

Definition of forcible felony, §702.11