In this tutorial, we’ll take a look at using user input as awhileloop condition in the Linux shell. 2. UnderstandingwhileLoops Before we dive into using user input, let’s first discuss the concept and syntax of awhileloop: while [condition]; do # Code block done Let’s break down ...
A While loop in a Bash script will trigger a series of commands to run repeatedly for as long as the condition result is “True.” Below is an example of Bash While loop syntax. Example: Explicit example: One-line While loop example: ...
The while Loop SyntaxA while loop in bash consists of a conditional expression and a loop body which is surrounded by do and done. The loop body continues to be executed as long as the condition evaluates to true. The conditional expression in while loop can be surrounded by either a pair...
The second form of for loop is similar to the for loop in ‘C’ programming language, which has three expression (initialization, condition and updation). for (( expr1; expr2; expr3 )) do commands done In the above bash for command syntax, before the first iteration, expr1 is evaluated...
echo "Welcome to Bash Scripting" i=$(( $i+1 )) done Bash while Loop in One Line It is always a good practice to use fewer lines of code. The while loop in Bash also offers a one-liner structure. The syntax of Bash while loop as a one-liner is given below: ...
Let’s break downwhile loopsyntax. while loopshould start with a while keyword followed by a condition. Aconditionshould be enclosed within[ ]or[[ ]]. The condition should always return true for the loop to be executed. The actual block of code will be placed betweendoanddone. ...
Awk While Loop Syntax: while(condition) actions while is a keyword. condition is conditional expression actions are body of the while loop which can have one or more statement. If actions has more than one statement, it has to be enclosed with in the curly braces. ...
The syntax of thewhilecommand is: while 命令的语法是: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 whilecommands;docommands;done Likeif,whileevaluates the exit status of a list of commands. As long as the exit statusis zero, it performs the commands inside the loop. In the script ab...
The syntax of thewhilecommand is: while 命令的语法是: while commands; do commands; done 1. Likeif,whileevaluates the exit status of a list of commands. As long as the exit statusis zero, it performs the commands inside the loop. In the script above, the variablecountis created and assig...
The syntax of thewhilecommand is: while 命令的语法是: whilecommands;docommands;done Likeif,whileevaluates the exit status of a list of commands. As long as the exit statusis zero, it performs the commands inside the loop. In the script above, the variablecountis created and assigned an ini...