Standard Bash For Loop Over Strings Over a Number Range Over Array Elements Break and Continue for Loop Break Statement Continue Statement Examples of Bash for Loops Share Loops are one of the most powerful an
Theforloopis an essential programming functionality that goes through a list of elements. For each of those elements, theforloop performs a set of commands. The command helps repeat processes until a terminating condition. Whether you're going through an array of numbers or renaming files,forloo...
#!/bin/bash ## declare an array variable declare -a array=("one" "two" "three") # get length of an array arraylength=${#array[@]} # use for loop to read all values and indexes for (( i=1; i<${arraylength}+1; i++ )); do echo $i " / " ${arraylength} " : " ${...
# Creating an arraymyArray=("Bash""Array""Of""Strings")# Printing the entire arrayecho${myArray[@]}# Output:# 'Bash Array Of Strings' Bash Copy In this example, we’ve created an arraymyArraywith four elements: “Bash”, “Array”, “Of”, and “Strings”. The[@]index is used ...
In this article, we will cover the basics of for loops in Bash and show you how to use the break and continue statements to alter the flow of a loop.
Here’s an example of a bash loop code with array elements: fruit_array=("apple" "banana" "red cherry" "green grape") for fruit in "${fruit_array[@]}" do echo "Fruit: $fruit" done The bash loop will iterate through items in the array and use theechocommand to print them with ...
Another syntax variation of for loop also exists that is particularly useful if you are working with a list of files (or strings), range of numbers, arrays, output of a command, etc. The list/range syntax for loop takes the following form: ...
# loop through strings resulting from a command for value in $(Linux command) do commands done # loop through increment or decrement numbers # traditional procedural for loop for (( i=0; i<10; i++) do commands done According to the above syntax, the starting and ending block of for...
for n in a b c d e do while true do if [ $RANDOM -gt 20000 ] then printf . break 2 ## break out of both while and for loops elif [ $RANDOM -lt 10000 ] then printf '"' break ## break out of the while loop fi done done echo 继续 在循环内部, continue命令通过传递任何剩余...
Example-1: For loop to read input variable List of predefined strings or array can be read easily by using ‘for’ loop which is shown in the previous tutorial of for loop. How the content of an input variable can be read by using ‘for’ loop is shown in this example. Create a fil...