# Loop from 0-100 (no variable support). for i in {0..100}; do printf '%s\n' "$i" done 循环遍历可变数字范围 替代seq。 # Loop from 0-VAR. VAR=50 for ((i=0;i<=VAR;i++)); do printf '%s\n' "$i" done 循环数组 arr=(apples oranges tomatoes) # Just elements. for elemen...
The disadvantage of using these operators is you can only increment/decrement by 1. You can use the operators in prefix and postfix manner so let's have a look at the difference between them: Prefix:If you use the operator as a prefix, like++var, the value of the variable will be incr...
making them a good choice for basic array looping. ‘While’ and ‘until’ loops offer more control over the loop condition, which can be useful in more complex scenarios. However, they require you to manually manage a counter variable, which can lead to off-by-one ...
Bash while Loop Bash Sequence Expression (Range) Bash break and continue How to Increment and Decrement Variable in Bash (Counter) Bash until Loop How to Create Bash Aliases Bash wait CommandIf you like our content, please consider buying us a coffee.Thank you for your support! Buy me a co...
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...
When bash is started non-interactively, to run a shell script, for example, it looks for the variable BASH_ENV in the environment, expands its value if it appears there, and uses the expanded value as the name of a file to read and execute. Bash behaves as if the following command ...
#Initialize the variable, n n=20 #Repeat the loop until the value of $n is greater than 0 until [ $n -lt 0 ] do #Check the value of n is odd if [[ $n%2 -gt 0 ]] then echo $n fi #Increment the value of n by 1 ((n=$n-1)) doneOutput...
for VARIABLE in 1 2 3 4 5 .. N Run the below command: command1 command2 commandN done In bash the above syntax will be given as; #!/bin/bash for i in 1 2 3 4 5 do echo "Hy $i" done Once you execute the above set of instructions, the results you will get will be someth...
/bin/bash## Name: test-bucket-1## Purpose:# Performs the test-bucket number 1 for Product X.# (Actually, this is a sample shell script,# which invokes some system commands# to illustrate how to construct a Bash script)## Notes:# 1) The environment variable TEST_VAR must be set# (...
((++NUM)) → Increment NUM variable by 1, similar to running NUM=$(( $NUM + 1 )) ((--NUM)) → Decrement NUM variable by 1, similar to running NUM=$(( $NUM - 1 )) EXAMPLE 2 - Infinite loops An infinite loop is where your condition is always evaluated to true and the loop...