<p>In <a href="/e/56">the previous lesson</a> we learned how use the expression register to evaluate simple calculations. We can also call built-in and user-defined Vimscript functions, and thanks to the <code>system()</code> function, we can also fetch output from external scripts.</p>

In the previous lesson we learned how use the expression register to evaluate simple calculations. We can also call built-in and user-defined Vimscript functions, and thanks to the system() function, we can also fetch output from external scripts.

<p>In <a href="/e/56" rel="noopener noreferrer">the previous lesson</a> we learned how use the expression register to evaluate simple calculations. We can also call built-in and user-defined Vimscript functions, and thanks to the system() function, we can also fetch output from external scripts.</p>

Evaluating scripts with Vim's expression register

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Evaluating scripts with Vim's expression register

Evaluating scripts with Vim's expression register