Makefile $@ variable-what is it used for?

I am new to learning make files.I was reading this post. cou开发者_Python百科ld anyone please tell me what is $@ variable used for inside a makefile?

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The $@ stands for the target of the current rule. More info here.

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It's used to refer to the target, for example:

test:
        gcc -o $@ $@.c

Would compile program test from test.c if you ran make test