一、输入一个小于100的整数,并计算从1到该数之间所有整数的和
[root@localhost ~]# vi qiuhe.sh
#!/bin/bash
read -p "请输入小于100的整数:" num
if [ $num -eq 1 ];then
echo "和等于: $num"
sum=0
elif [ $num -gt 1 ] && [ $num -lt 100 ];then
for ((i=1; i<=$num; i++))
do
let sum=$sum+$i
done
echo "1到$num的和为$sum"
else
echo "输入错误!"
fi
[root@localhost ~]# chmod +x qiuhe.sh
[root@localhost ~]# ./qiuhe.sh
请输入小于100的整数:30
1到30的和为145
二、输入一个小于100的整数,并计算从1到该数之间的奇数和、偶数和
```[root@localhost ~]
read -p "请输入小于100的整数:" num
if [ $num -eq 1 ];then
echo "和等于: $num"
sum=0
sum1=0
elif [[ $num -gt 1 && $num -lt 100 ]];then
for ((i=1; i<=$num; i++))
do
a=$[$i % 2]
if [ $a == 0 ];then
let sum=$sum+$i
elif [ $a == 1 ];then
let sum1=$sum1+$i
fi
done
echo "1到$num的偶数和为: $sum"
echo "1到$num的奇数和为: $sum1"
else
echo "输入错误!"
fi
[root@localhost ~]
[root@localhost ~]
请输入小于100的整数:5
1到10的偶数和为: 6
1到10的奇数和为: 9