Math commands
The following procedures provide command interfaces to the expr math
functions. They take the same arguments as the expr functions and
may take expressions as arguments:
abs

acos

asin

atan

atan2

ceil

cos

cosh

double

exp

floor

fmod

hypot

int

log10

log

pow

round

sin

sinh

sqrt

tan

tanh



In addition, these math commands are available:
max(TCL)
returns the argument with the highest numeric value
min(TCL)
returns the argument with the lowest numeric value
random(TCL)
returns a pseudorandom positive integer
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