Bash Shell 中数字运算

A=`expr $B + 1`

for i in $(seq 1 10)
do
    k1=`expr $i + 1`
    for j in $(seq 1 $i)
    do 
         echo $j
    done
    
    for j in $(seq $k1 10i)
    do 
         echo $j
    done
 done