Echo
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The echo command is a command avaliable in GoldSrc and
Source. It's main purpose is to output text into the console window. This command proves to be very useful for debugging purposes.
Syntax
echo <text>
Examples
echo Hello world
Special use
When appended to a key bound to a + statement (but only directly), the key code will be appended
bind shift “+duck; echo key :”
key : 79
will be seen in the console twice; once on press, once on release.