bashforindexin"${!my_array[@]}";doecho"${my_array[$index]}"done C风格的for循环: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 bashfor((i=0;i<${#my_array[@]};i++));doecho"${my_array[i]}"done 每种方法有其特点,选择哪一种取决于具体需求和个人偏好。 数组元素的添加和删除 ...
$echo${array[i]}说明:数组是从序号0开始计算(即第1项为array[0])。 (02) 显示数组中的所有元素 $echo${array[@]}或者 $echo ${array[*]} (03) 显示数组长度 $echo${#array[@]}或者 $echo ${#array[*]} (04) 删除数组第2项元素 $unset array[1]说明: unset仅仅只清除array[1]的值,并没...
它的语法与for...in循环基本一致。select name [in list] do commands doneBash 会对select依次进行下面的处理。select生成一个菜单,内容是列表list的每一项,并且每一项前面还有一个数字编号。 Bash 提示用户选择一项,输入它的编号。 用户输入以后,Bash 会将该项的内容存在变量name,该项的编号存入环境变量REPLY。
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如果要使用默认值0来初始化较大的数组中每个元素,可以使用for 循环。 # 初始化一个大小为 500 的数组,默认值为0 # declare -a my_big_array=($(for i in {1..500}; do echo 0; done)) 读取和写入索引数组中的值 要在索引数组中的特定索引位置读取或写入值,使用中括号[]指定索引。
For循环基本格式:for variable in list do commands done While语句基本语句格式为:while test-condition do commands done 2.5 数组 Bash中数组是通过空格符号隔开,并且是包含在()里面。引用时从序号0开始。如:Array=(23.5 27 29 31 25.7) 其中array[0]=23.5,array[4]=25.7 ...
We are going to use two elements to check if bash array is empty or not. One is${#array[@]}and other is the-zoperator. Here, the${#array[@]}is used in Bash for array expansion, allowing you to access all elements of an array.Don't confuse it with${array[*]}which treats the...
“e” that has been getting the total size of this array “Arr2” using the “@” operator within its index. The “for” loop has been utilized to iterate the array and display each of its string values at the Bash shell using the “echo” statement and index “I”. Let’s save ...
For example, if I want to print the 5th element of the array, then, I will be using the following: echo "Enter whitespace-separated values:" read -a array echo "The 5th element in an array is: ${array[5]}" 2. Read into an array using a file (using a loop) ...