linux輸出九九乘法表

shell腳本

#!/bin/bash

for ((i=1;i<=9;i++)) do                
    for ((j=1;j<=i;j++)) do
        printf "%d * %d = %d\t" $j $i $[i*j]
    done
    echo
done

awk命令

awk 'BEGIN{
    for (i=1;i<=9; i++)
    {
        for (j=1;j<=i;j++)
        {
            printf("%d * %d = %d\t", j,i,i*j);
        }
        printf("\n");
    }
}'