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bc:tldr:c5533
bc: Calculate an expression.
$ bc --expression='${5 - 3}'
try on your machine
The command bc --expression='${5 - 3}'
is using the bc
command-line calculator with a specific mathematical expression as an argument.
bc
is a command-line calculator that allows you to perform mathematical calculations.--expression
is an option or flag forbc
that indicates that the following argument is a mathematical expression to be calculated.'${5 - 3}'
is the mathematical expression itself enclosed in single quotes.
In this specific expression, ${5 - 3}
, we have a subtraction operation.
${}
is a Bash shell syntax used for parameter expansion or substitution. It allows you to access the value of a specific bash parameter or variable.5
and3
are the values being subtracted.
So, when you execute this command, bc
will perform the calculation of 5 - 3
, which equals 2
. The result 2
will be printed on the terminal output.
This explanation was created by an AI. In most cases those are correct. But please always be careful and
never run a command you are not sure if it is safe.