展示注释 #! /bin/bash cat << kreativ this is hello creative text and another line kreativ 希望comments可以展示在交互端 4. Conditional Statements IF #! /bin/bash count = 10 if [ $count -eq 10 ] then echo "the condition is true" else echo "the condition is flase" fi -eq ( euqa...
Similar toforandwhile, theuntilstatement allows you to define a conditional loop. However, the difference ofuntillies in how the condition is handled. Thefor/whileloops are executed while the condition is true. On the other hand,untilloops are iterateduntilthe condition is true, meaning that th...
Combine Loops and ConditionalsLoops and conditional statements are also popular in bash scripting. We’ll look at a few instances of using both in the same script:#!/bin/bashisvalid=truecount=1while [ $isvalid ]doecho $countif [ $count -eq 5 ];thenbreakfi((count++))done...
Before we start with quotes and quotations we should know something about escaping meta characters. Escaping will suppress a special meaning of meta characters and therefore meta characters will be read by bash literally. To do this we need to use backslash "\" character. Example: #!/bin/bash...
Loops:Execute commands repeatedly, such asforandwhileloops. Conditionals:Make decisions in your script usingif,elif, andelsestatements. Functions:Define reusable blocks of code that can be called multiple times within the script. And much more!
Pass arguments and accept user inputs in your bash scripts Perform mathematical calculations Manipulate strings Use conditional statements like if-else Use for, while and until loops Create functions 💡 All the sections will give you a brief example. If you wish, you can extend on the section...
9. Conditional Statements The most popular and widely used conditional statement isif. Even though the if statement is easy to write and understand, it can be used in advanced shell scripts as well. Begin with a new bash file: nano if.sh ...
The program prints all the numbers to the console. Due to the conditional and continue statements, a different message prints for number9. Using Bash Continue with an until Loop Combine thecontinuestatement with anuntilloop and provide a condition to change the loop behavior for a certain value...
The control loop statements (breakandcontinue) combine logically withconditional statementssuch asif elif elseto create special situations insideloops. This tutorial teaches you how to use thebreakstatement efficiently in Bash script loops. Prerequisites ...
The above command executes the Bash script and prints the string as shown in the output image. Likewise, you can perform any logical operation using conditional statements or execute instructions repeatedly; loops can be implemented. This write-up is about Bash loops. Loops are used to run some...