Shell-Bash: A Comprehensive Guide on how to Use the 'fi' Command

Are you a programmer looking for ways to improve your Bash scripting skills? Look no further! The 'fi' command in Bash is an essential aspect of programming in Bash. This command is used in Conditional Statements to execute a set of commands only if a specific condition is met. In this guide, we will take a deep dive into using the 'fi' command in Bash.

Syntax

The syntax for using the 'fi' command is as follows:

if [ condition ]
then
    commands
fi

The 'if' statement is used to check a specific condition. If the condition is true, the 'then' statement is executed. The 'fi' command indicates the end of the 'if' statement. You must use the 'if', 'then', and 'fi' keywords in this exact order.

Example

Here is an example of how to use the 'fi' command in Bash:

#!/bin/bash
echo "Enter a number:"
read num
if [ $num -lt 10 ]
then
    echo "The number is less than 10"
else
    echo "The number is greater than or equal to 10"
fi

In this example, we are checking whether the variable 'num' is less than 10. If the variable 'num' is less than 10, then the command 'echo "The number is less than 10"' is executed. Otherwise, the command 'echo "The number is greater than or equal to 10"' is executed.

Conclusion

In conclusion, the 'fi' command plays a vital role in programming in Bash using conditional statements. It indicates the end of the 'if' statement and can help improve the efficiency of your Bash scripts. With this guide, you should now have a better understanding of how to use the 'fi' command in Bash. Happy scripting!