How do I check if input is one word or 2 separated by delimiter "-" - awk

Question

I need help with the following ksh script:
ExpResult=`echo "$LoadString" | awk -F"-" '{print NF}'=2`
MinExp=`echo "$ExpResult" | tr -s " " | sed 's/^[ ]//g'| cut -d"-" -f1`
MaxExp=`echo "$ExpResult" | tr -s " " | sed 's/^[ ]//g'| cut -d"-" -f2`
I can get an input as two options : "50-100" or "50" (for example)
I have two questions:
How do I check if the input is "one word" or two words separated by delimiter "-"?
If the input is two words, how can I separate them?

Answer 1

Rather than call an external program to parse your input, you can use the internal case statement to validate input and parameter expansion features to convert your input, i.e.
# set a copy/paste value for $1
set -- 50-10
case "$1" in
*-* )
range="$1"
min="${range%-*}"
max="${range#*-}"
;;
* )
singleNum="$1"
;;
esac
echo min=$min ... max=$max
output
min=50 ... max=100
Try for non-pair
unset min max
set -- other values
case ...
echo min= ... max= ... singleNum=$singleNum
output
min= ... max= ... singleNum=other
Hopefully the case processing is self-explanatory, but the parameter expansion may require a little explanation.
The statement
min=${range%-*}
says remove from the right side of the expanded value (50-100) anything starting at the last - until the end of the string. This leaves the value 50 remaining.
The reverse happens with
max=${range#*-}
Says remove from the left side of the expanded value anything up to the first - char. This leaves the 100.
As there is only one - char in this string, you don't need to worry about the other versions of ${var##*-} which says remove all from the left until the last match of -, and the reverse ${var%%-*} , remove all from right (backwards) until the very first - char.
The fanatical minimalists will remind us that this can be done without a temporary variable, i.e.
min=${1%-*} ; max=${1#*-}
And the one-line fantasists can be satisfied with
case "$1" in *-* ) range="$1";min="${range%-*}";max="${range#*-}";;* ) singleNum="$1";;esac; echo min=$min ... max=$max .,, singleNum=$singleNum
:-)
IHTH

Answer 2

you can try this;
LoadString=$1
MinExp=`echo "$LoadString" | awk -F"-" '{if (NF==2) print $1}`
MaxExp=`echo "$LoadString" | awk -F"-" '{if (NF==2) print $2}`
echo $MinExp
echo $MaxExp
eg:
user#host:/tmp/test$ ksh test.ksh 50-100
50
100