calculation

Calculation

The operators of calculation and the point that joins texts, on the time since a Linux started: a number of days, and the same in words, "4 d 1 h".

How to read it

• + - * / as in school; % is the rest of a division: $seconds % 86400 are the seconds left once the whole days are counted.
• *, / and % come before + and -; what is between parentheses comes first of all.
• number.round($n) rounds to a whole number, number.round($n, 2) keeps two decimals.
• A text that is the writing of a number counts as that number in a calculation: $words[0], read from the command, divides.
• The point joins texts, a number counting as its digits. It takes a blank on each side: $days . ' d ', never $days.' d '.
• The point is under + and -: 'total ' . $a + $b reads 'total ' . ($a + $b).

To adapt it

• **, +=, ++ do not exist: write $x * $x, $x = $x + 1.
• The watch warns under 0.1 day, about two hours and a half after a restart.