bash - Why do I not see the full expected range of random numbers? -

this question has answer here:

• random number range in bash script 15 answers

i expect below code generate (quasi) random numbers between 0.9 , 1.0 rh.

randno5=$((random % 100001)) upper_limit5=$(echo "scale=10; 1*1.0"|bc) lower_limit5=$(echo "scale=10; 1*0.9"|bc) range5=$(echo "scale=10; $upper_limit5-$lower_limit5"|bc) rh=`echo "scale=10; ${lower_limit5}+${range5}*${randno5}/100001" |bc` 

however, when run code value between 0.9 , 0.933(3sf). why case?

$random is, @ most, 32767:

   random each time parameter referenced, random integer between           0 , 32767 generated.  sequence of random numbers may           initialized assigning value random.  if random unset,            loses   special  properties,  if subsequently           reset. 

your modulus have no effect generated numbers restricted range.