os.clock

Returns the time since the Computer was booted in seconds.

ExampleGet the running Time
Print the time since the Computer is running in seconds.
Code 
print("The Computer is running since "..os.clock().." seconds")
Output 
The Computer is running since 10 seconds

os.clock
Function
Syntax
os.clock()
Returns number
API os
Source CC:Tweaked (source)
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