可以换成: total=`expr$total +$var` var=`expr$var +1` 下面的循环同理 Until Loop #!/bin/bash var=1total=0until[ $var -gt100];dototal=$((total +var)) var=$((var+1))doneechosumis $total For Loop #!/bin/bash total=0forvarin`seq1100`;dototal=$((total +var))doneechosumis ...
Example 5: C-style for Loop #!/bin/zshfor((i=1;i<=5;i++))doecho"Number:$i"done Practical Example: Creating Backup Files Create the script file backup.sh: nano backup.sh Add the following content: #!/bin/zshsource_dir="/path/to/source_directory"backup_dir="/path/to/backup_direct...
Loops can be nested. Like any other programming language, bash also supports break statement to exit the current loop, and continue statement to resume the next iteration of the loop statement. Bash For Loop – First Method For loops are typically used when the number of iterations is known b...
当在进入 bash 循环之前知道迭代次数时,通常使用 for 循环。Bash 支持两种 for 循环。bash for 循环的第一种形式是: forvarnameinlistdocommands ##Bodyofthe loop done 在上面的语法中: for、in、do 和 done 是关键字 列表是具有项目列表的任何列表 varname 是任何 Bash 变量名。 在这种形式中,for 语句执...
for n in {1..7}; do echo $n done Once the shell script is executed, all the values in the range are listed, similar to what we had insimple loops. Bash For Loop with Ranges Example Additionally, we can include a value at the end of the range that is going to cause thefor loop...
line done 使用while循环 while read -r line do echo $line done < filename While循环中read命令从标准输入中读取一行,并将内容保存到变量...line中。...在这里,-r选项保证读入的内容是原始的内容,意味着反斜杠转义的行为不会发生。输入重定向...
for loop实例三 for FILE in $(find /var/ -size +10M) do rm -f $FILE logger "$FILE has been deleted" echo -e "\033[33m$FILE\033[0mhas been deleted">>/var/tmp/largefile.log done 1. 2. 3. 4. 5. 6. 7. 获取某个文件中的空格或者换行的ip地址方法: ...
在替换bash中嵌套的for循环时,可以使用更高效和简洁的方法来实现相同的功能。替代for循环的方法主要有两种:使用管道和使用循环构造。 1. 使用管道:在bash中,可以使用管道将多个命令连接起...
for ((i=1;i<=5;i++)) do if [ $i == 3 ] then continue fi echo $i done Due to the if condition, the loop will skip the echo command for value 3; therefore, the output will be: 1 2 4 5. Loop Over Command Line Arguments We can give command line arguments to our bash ...
Similar to for and while, the until statement allows you to define a conditional loop. However, the difference of until lies in how the condition is handled. The for/while loops are executed while the condition is true. On the other hand, until loops are iterated until the condition is ...