分支
#!/bin/bash
read mychar
if [ "$mychar" == 'y' -o "$mychar" == 'Y' ];then
echo YES
elif [ "$mychar" == "n" -o "$mychar" == "N" ];then
echo NO
fi
循环和数组--替换国家名称的首字母为圆点
#!/bin/bash
#https://www.hackerrank.com/challenges/bash-tutorials-remove-the-first-capital-letter-from-each-array-element/problem?h_r=next-challenge&h_v=zen
read country
idx=0
while [ -n "$country" ]
do
arr[idx]="$country"
read country
let idx+=1
done
#echo ${arr[*]}
length=${#arr[@]}
for((i=0;i<length;i++))
do
myvar=${arr[i]}
echo -n "."${myvar:1}" "
done
数组的下表和数组的值:找出一个不配对的数组元素
#!/bin/bash
#https://www.hackerrank.com/challenges/lonely-integer-2/problem?h_r=next-challenge&h_v=zen&h_r=next-challenge&h_v=zen
read N
read Line
arr=($Line)
for e in ${arr[@]}
do
if [ -z "${cnt[e]}" ]; then
cnt[e]=1
else
let cnt[e]+=1
fi
done
#echo "${cnt[@]}"
#echo ${!cnt[@]}
for e in ${!cnt[@]}
do
if [ ${cnt[e]} -eq "1" ]; then
echo "$e"
break
fi
done