Re: How to search a whole word in emacs?

[Eric Hanchrow]

    I need to search  a whole word in a big file. For example, I need to
    search "Machine" but I don't need to know anything like
    "machine_state", "running_machine_state" etc. The search shall be case
    sensitive.

    I've tried C-s ret C-w Machine but it returns every word with
    "Machine" in it. I just need the exact word.

You want either 

        M-C-s \ b M a c h i n e \ b

or perhaps

        M-x word-search-forward RET Machine RET

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