What is armed robbery and who is an armed robber?

If you steal something with your arms (and hands) then you are an armed robber. Armed robbery is when you steal from somebody using your arms to carry what you steal.

No its not. Armed robbery is when you use force or a weapon to gain access into someones home, which in that case has to be when someone is home in order to inflict intimidation upon to gain access. Someone who is an armed robber would be someone who chooses to rob a home while someone is there by way of force, intimidation, and/or with a weapon.

A "robbery" is committed when one person gains possession or control of another person's property by force or the threat of force. The robbery is "armed" when the threat of force involves an actual or implied weapon.