mirror of
https://github.com/dunwu/linux-tutorial.git
synced 2024-04-15 19:55:24 +08:00
52 lines
643 B
Bash
52 lines
643 B
Bash
#!/usr/bin/env bash
|
|
|
|
################### while 循环输出 0 ~ 9 的平方数 ###################
|
|
x=0
|
|
while [[ ${x} -lt 10 ]]; do
|
|
echo $((x * x))
|
|
x=$((x + 1))
|
|
done
|
|
# Output:
|
|
# 0
|
|
# 1
|
|
# 4
|
|
# 9
|
|
# 16
|
|
# 25
|
|
# 36
|
|
# 49
|
|
# 64
|
|
# 81
|
|
|
|
################### while 循环输出 0 ~ 9 ###################
|
|
x=0
|
|
while echo ${x}
|
|
[[ ${x} -lt 9 ]]
|
|
do
|
|
x=$((x + 1))
|
|
done
|
|
# Output:
|
|
# 0
|
|
# 1
|
|
# 2
|
|
# 3
|
|
# 4
|
|
# 5
|
|
# 6
|
|
# 7
|
|
# 8
|
|
# 9
|
|
|
|
################### while 循环嵌套 for 循环 ###################
|
|
x=5
|
|
while [[ $x -ge 0 ]]
|
|
do
|
|
echo "Outer loop: $x"
|
|
for (( y = 1; $y < 3; y ++ ))
|
|
do
|
|
z=$[ $x * $y ]
|
|
echo "Inner loop: $x * $y = $z"
|
|
done
|
|
x=$[ $x - 1 ]
|
|
done
|