linux - Bash script error with exponent expression -

linux - Bash script error with exponent expression -

i'm writting script outer loop , 2 inner loop, must not correctly typing out syntax want write look first inner loop raise $2 powerfulness of j + 1: $2^(j+1)

this not finish script:

for((d=0;d<=($2**($j+1));d++)) <---- done

what proper way write such look in loop?

you try

for((d=0;d<=$(($2**($j+1)));d++)) <----

$ sign , double (( around expression.

depends bit on bash version using. don't need $...

linux bash