Sort an array while inserting by ascending order in bash

insertSort.sh

read N
read tab[0]
for (( i=1; i<N; i++ )); do
    read x
    j=0
    k=$i
    while [ $k -gt $j ]
    do
        m=$((($j+$k)/2))
        if [ $x -lt ${tab[$m]} ]; then
            k=$m
        else
            j=$(($m+1))
        fi
    done
    tab=( "${tab[@]:0:j}" $x "${tab[@]:j}")
done