Say hello to the class.

[giddyman]

Please look at the following two sentences.
Can the first sentence be used instead of the second one?
Please help.

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1. Say hello to the class.
2. Introduce yourself to the class.

 

[corum]

1. ≠ 2.
:up:

 

[giddyman]

1. ≠ 2.
:up:

Please give me a little detailed information.

 

[birdeen's call]

Introducing oneself is a little bit more than just saying hello. To introduce yourself you have to give some information about yourself, e.g. your name.