Bash脚本,在while循环中有多个条件

# Single POSIX test command with -o operator (not recommended anymore).
# Quotes strongly recommended to guard against empty or undefined variables.
while [ "$stats" -gt 300 -o "$stats" -eq 0 ]

# Two POSIX test commands joined in a list with ||.
# Quotes strongly recommended to guard against empty or undefined variables.
while [ "$stats" -gt 300 ] || [ "$stats" -eq 0 ]

# Two bash conditional expressions joined in a list with ||.
while [[ $stats -gt 300 ]] || [[ $stats -eq 0 ]]

# A single bash conditional expression with the || operator.
while [[ $stats -gt 300 || $stats -eq 0 ]]

# Two bash arithmetic expressions joined in a list with ||.
# $ optional,as a string can only be interpreted as a variable
while (( stats > 300 )) || (( stats == 0 ))

# And finally,a single bash arithmetic expression with the || operator.
# $ optional,as a string can only be interpreted as a variable
while (( stats > 300 || stats == 0 ))

一些注意事项：

>引用[[…]]和((…)中的参数扩展是可选的;如果未设置变量，-gt和-eq将假定值为0。>使用$是可选内部((…))，但使用它可以帮助避免无意的错误。如果没有设置stats，那么((stats> 300))将假定stats == 0，但是(($ stats> 300))将产生语法错误。