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Bash if else statement

Submitted by johnwalsh on Monday 20th of January 2020 06:21:27 AM Filed under
Linux

Bash if statement, if else statement, if elif else statement and nested if statement used to execute code based on a certain condition. Condition making statement is one of the most fundamental concepts of any computer programming. Moreover, the decision making statement is evaluating an expression and decide whether to perform an action or not.

In this tutorial, you will learn Bash if statements and how to use them in your bash script. Moreover, we can understand if statements through the flow diagram.

The Bash if statement represent the following 4 different type forms.

if Statement
if..else Statement
if..elif..else Statement
Nested if Statements

Syntax:
-------
if EXPRESSION
then
STATEMENTS
fi

Example:
--------
#!/bin/bash

echo -n "Enter a numeric value: "
read value

if [ $value -gt 0 ]
then
echo "Value is Positive"
fi

»

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