if [[ $USER_INPUT -lt 100 ]]; then echo "Your entry is less than one hundred" fi Output for this script will be able to test if the input is less than 100 and run specific code on that condition: linuxhint@:~$ bash t3.sh Enter a number: 99 Your entry is less than one hundr...
Bash, short for "Bourne Again SHell," is a powerful scripting language used in Unix-based operating systems. One of the fundamental constructs in Bash programming is the if statement. The if statement allows you to control the flow of your script based on specific conditions. In this article,...
If statement and else statement could be nested in bash. The keyword “fi” indicates the end of the inner if statement and all if statement should end with the keyword “fi”. The “if then elif then else fi” example mentioned in above can be converted to the nested if as shown belo...
Conditional tests can be performed in Bash Scripting using the "if" statement, where the statement inside the "if" block is executed only if the specified condition is met. How can I check for a existing file in a bash script? Use theif [ -f "file.txt" ]; thencommand to check if ...
[ s1 ] (true if s1 is not empty, else false) [ -n s1 ] (true if s1 has a length greater then 0, else false) [ -z s2 ] (true if s2 has a length of 0, otherwise false) Example Script number.sh #!/bin/bash echo -n “Enter a number 1 < x < 10: " ...
In a real script, if you have already seen a script, you may not see this keyword test; instead, you will see the statement inside brackets like this − if [ $x -eq $y ] The brackets tell bash that we want to test what’s inside, and it does the same as the test keyword. ...
The example shows how to exit an infiniteforloop using abreak. TheBash if statementhelps check the value for each integer and provides thebreakcondition. This terminates the script when an integer reaches the value ten. To exit a nested loop and an outer loop, usebreak 2. ...
An "if" statement is used to check if the number is greater than 100. The condition [ "$n" -gt 100 ] checks if the value of '$n' is greater than 100. If the condition evaluates to true, the script prints "The number is greater than 100." using "echo". ...
bash shell if-statement while-loop m3u 我正在编写一个脚本来解析m3u文件。目标是检索变量标记和url。我用这个文件做了测试。 #!/bin/bash echo "name,tvg-id,tvg-name,tvg-country,group-title,languages,url" while IFS= read -r line; do tags_detect="$(echo "$line" | grep -Eo '^#EXTINF:')...
Create a file named ‘simple_if.sh’ with the following script to know the use if statement in bash. Here, 10 is assigned to the variable, n. if the value of $n is less than 10 then the output will be “It is a one digit number”, otherwise the output will be “It is a two...