use loop variable for calculation bash

Question

for i in {0..9} do
    T=$(bc<<<"8+$i*0.5")
    echo $T
done  

I get :

syntax error near unexpected token `T=$(bc<<<"8+$i*0.5")'

I believe the problem is the $i. What am I doing wrong?

Answer 1

The problem is not $i, the problem is in your for construct syntax. You need a newline or ; before do (if used right after the for declaration):

for i in {0..9}; do
    T=$(bc <<<"8+$i*0.5")
    echo "$T"
done 

Or

for i in {0..9} 
do
    T=$(bc <<<"8+$i*0.5")
    echo "$T"
done

For clarity, it's better to use whitespace before the here string (<<<) (and similar).

Although not strictly necessary in this case, you should quote your variable expansions.