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This question already has an answer here:

I need to convert some javascript calculations to bash, and I am wondering if there is an equivalent function of javascript Math.min() in bash, bc or any other calculator in the shell?

marked as duplicate by mikeserv, Stephen Kitt, vonbrand, Ramesh, Jakuje Jan 10 '16 at 22:19

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  • How will the data be presented? Shell array? Separate variables ? A string - one with newline separators? – Jeff Schaller Jan 10 '16 at 18:38
  • 1
    No, there is no pre-defined minimum. But you should read stackoverflow.com/q/21452752/2350426 – user79743 Jan 10 '16 at 19:36
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With POSIX shell:

min() {
  min=$1
  shift
  for arg do
    min=$((arg<min?arg:min))
  done
  printf '%s\n' "$min"
}

All shells but zsh, ksh and yash do not support float numbers.

With POSIX toolchest:

min() {
  awk 'BEGIN {
    min = ARGV[1]
    for(i = 2; i < ARGC; i++)
      min = ARGV[i] < min ? ARGV[i] : min
    print min
  }' "$@"
}

And if you have perl:

min() {
  perl -MList::Util=min -le 'print min @ARGV' "$@"
}

or perl6:

min() {
  perl6 -e '@*ARGS.min.say' "$@"
}
-1

Push your data to a file, then sort them up and get the first line.

#/bin/sh

echo $VAR1 > $FILE
echo $VAR2 >> $FILE
echo $VAR3 >> $FILE 

RET=$(sort -n $FILE | sort -n)
  • We expect answers to be more comprehensive here. Please edit your answer and explain how exactly the OP can do what you suggest. As it stands, this is a comment, not an answer. – terdon Jan 10 '16 at 19:39

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