How can I write the null character on a Macbook Pro?

How can I write a null character on a Macbook Pro? I'd prefer to use just the keyboard or something that I can reach everywhere, without using a third-party program.

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2 Answers

You can do this with the Unicode Hex Input method (enable it in System Preferences -> Language & Text pane -> Input Sources tab, then select it from the menu item) by holding Option and typing "0000".

Warning: the null character is not allowed in C-language strings (it's used to indicate the end of the string), so not all programs will cope with it. In TextEdit, for example, you can insert a null into a document, but when you save the document it'll only save the part before the null.

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Depends on your terminal, in Terminal.app and Iterm2 you can use ^@ (Ctrl+Shift+2). See here.

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