How can I swap or replace multiple strings in code at the same time?

Question

Given the following code sample:

uint8_t i, in, ni;
i = in = 2; ni = 1;
while (2 == i > ni) in++;

How can I replace i, in, and ni<

Answer 1

Most easiest way would be to use the replace functionality of gedit.

In vi,

%s/old/new/g will replace all occurrences of "old" with "new" through out the file.