Possible Duplicate:
Difference between ~なきゃ and ~なくちゃ
What does いなきゃ mean?
Possible Duplicate:
Difference between ~なきゃ and ~なくちゃ
What does いなきゃ mean?
「いなきゃ」 is short for 「いなければ」.
いなきゃ ≒ いなければ ≒ いないのであれば 'If (someone) is not (somewhere)...'
e.g. 君がいなきゃ、会議が始められないよ。
We can't begin the meeting without you.
いなきゃ ≒ いなければ ≒ いなければならない '(Someone) has to be (somewhere).'
e.g. 君がいなきゃ。
We can't do without you (=You have to be here).