The basic syntax of a for loop in Bash is: forvariableinlistdocommandsdone Examples Example 1: Iterating Over a List of Words #!/bin/zshforwordinapple banana cherrydoecho"The word is:$word"done Example 2: Iterating Over a Range of Numbers ...
Caution: As a best practice, you should always quote the bash variables when you are referring it. There are few exceptions to this best practice rule. This is one of them. If you double quote the variable in this for loop, the list of values will be treated as single value. Lot of ...
The script uses a for loop to iterate over a range of numbers from 1 to 20. The loop variable 'i' represents each number in the range. Within the loop, an if statement checks if the current number ('i') is odd using the condition i % 2 != 0. If the condition evaluates to true...
An infinite loop is a loop that keeps running forever; this happens when the loop test condition is always true. In most cases, infinite loops are a product of a human logical error. For example, someone who may want to create a loop that prints the numbers 1 to 10 in descending order...
Multiple for loop variations are available in bash; we will quickly see some below. for in the Range of Numbers We can specify a list of numbers with a for loop and can iterate on those numbers one by one, as depicted by the following example: for i in 1 3 8 do echo $i done ...
For instance, in the below example, the loop will repeat each item in the list of strings and variable element fixed to the current item. for element in Gold Silver Diamond Platinum do echo "Element: $element" Done Over a Number Range Similarly, to define a range of numbers, one can ...
There is no good reason to use an external command such as seq to count and increment numbers in the for loop, hence it is recommend that you avoid using seq. The builtin command are fast. Three-expression bash for loops syntax
for OUTPUT in $(Linux-Or-Unix-Command-Here) do command1 on $OUTPUT command2 on $OUTPUT commandN done 1. 2. 3. 4. 5. 6. Examples This type of for loop is characterized by counting. The range is specified by a beginning (#1) and ending number (#5). The for loop executes a seq...
for element in Hydrogen Helium Lithium Beryllium do echo "Element: $element" done CopyThe loop will produce the following output: Element: Hydrogen Element: Helium Element: Lithium Element: Beryllium Copy Loop over a range You can use the sequence expression to specify a range of numbers or ...
在类Linux 下,写脚本任务经常需要通过 bash shell 循环执行固定次数或在指定数字范围,可以通过for ... in ...语句搞定。 1for ... in ... for ... in ... 如果要在指定数据范围内循环执行,示例如下: foriin{7..14}doecho$idone 如上所述,从 7 依次遍历到 14,即循环 8 次,且可以获取对应的数字...