these are called backticks
bc is a terminal calculator program
apt install bc
man bc
Quote:
The backtick (``) is actually called command substitution. The purpose of command substitution is to evaluate the command which is placed inside the backtick and provide its result as an argument to the actual command. The command substitution can be done in two ways one is using $() and the other is "``" .Dec 22, 2011
|
look above^^
Quote:
STARTTIME=(`date +%s`)
try like this and the time will be in epoch seconds
ENDTIME=(`date +%s`)
|
I just habitually close an expression in () for clarity in my code -- it is probably in most cases superfluous (but benign)
Like
our @array =(<FILENAME>);