Bash腳本 - 用戶輸入空格分隔的兩位數字;需要驗證它是一個數字

Question

需要在BASH中有一個讀取語句，它會要求用戶在同一行上輸入2位數字，並在其間插入一個空格。檢查兩者是否都是數字，並且兩者之間有空格。

Answer 1

#!/bin/bash 
result="" 
while [[ $result == *" "* || $result == "" ]];do 
    read -p "Type 2 digits without space:" result; 
    echo "Error"; 
done 

Answer 2

#!/bin/bash 

while : 
do 
    read -p "digits a b?: " resp 
    if [ -z "${resp}" ] ; then continue;fi 

    respCtrl=`echo $resp | sed 's/[^0-9 ]//g'` 
    if [ ! ${#respCtrl} -eq ${#resp} ] ; then continue ;fi 

    set ${resp} 
    digit1=$1 
    digit2=$2 
    if [ "${digit1} ${digit2}" != "${resp}" ] ; then continue;fi 

    echo ${digit1} ${digit2} 
    break 
done