I need to round a number to two decimal places. Right now the following rounds to the nearest integer I guess
puts [expr {round($total_rate)}]
If I do something like below it does not work. Is there another way around?
puts [expr {round($total_rate,2)}]
Answer
The simplest way to round to a specific number of decimal places is with format:
puts [format "%.2f" $total_rate]
Be aware that if you're using the rounded value for further calculations instead of display to users, most values that you print using rounding to X decimal places will not have an exact representation in binary arithmetic (which Tcl uses internally, like vast numbers of other programming languages). It's best to reserve rounding to a specific number of DPs to the point where you're showing values to people.