How to carry out arithmetic on the command line, with an emphasis on the utility of the modulo operator.
0:00 Calculating arithmetic in BASH
0:14 Operators and modulo
0:27 Printing the remainder of division
0:34 Screening for multiples of a number
0:47 Example with 'for' loop
0:59 Example with random numbers
1:27 Example with 'while' loop
1:48 No floating point arithmetic