In a Bash script, we can have multiple types of conditional statements like: ifstatements if .. then.. elsestatement if .. elifstatements Nestedifstatements casestatements We’ll discuss theifstatements with single and multiple conditions. Before moving towards theifstatement, let’s see some com...
ifCONDITION-TO-TEST;then CODE-TO-EXECUTE-1 elifNEXT-CONDITION-TO-TEST;then CODE-TO-EXECUTE-2 elifNEXT-CONDITION-TO-TEST;then CODE-TO-EXECUTE-2 else CODE-TO-EXECUTE-2 fi Note: In the above general syntax that you can include zero, one or multipleELIFconditions in the code block and the...
Multiple conditions with multiple if statements are declared in this example to print grade based on input mark. Create a file named‘cond4.sh’ and add the following script. After taking the value of$mark, the first `if` statement will test the value is greater than or equal to 90. If...
Q1. Can I have multiple conditions in a single if statement? A1. Yes, you can combine multiple conditions using logical operators such as && (AND) and || (OR) to create compound conditions within a single if statement. Q2. Can I use the if statement to check the existence of a file...
So far, so good. But do you know that you may have multiple conditions in a single by using logical operators like AND (&&), OR (||) etc? It gives you the ability to write complex conditions. Let's write a script that tells you whether the given year is a leap year or not. ...
bash 中的条件语句,基础就是 Test 。 if 先来个实例: x=5; if [ $x = 5 ]; then e...
echo"Conditions are true" fi # TRUE && FALSE if["mylife"=="mylife"] && [3-gt10]; then echo"Conditions are false" fi Output Example 5 In this example, we will define how to use OR operator to include multiple conditions in the if expression: ...
if[[ !expr]];thenCopy Let’s consider another example: num=1if[[ !$num-eq 0 ]]thenecho"Value of num is not 0"fiCopy Here we have used thenot(!) operator for an individual expression. When we have multiple expressions, thenot (!)operator is applied only to the individual expression...
To get a deeper understanding and review, read the accompanying lesson, Bash Scripts: If Statements. The lesson covers: What a bash script if statement is Writing a basic if statement Adding conditions to if statements Using multiple conditions ...
if [ expression ]; then ## execute this block if condition is true else go to next elif [ expression ]; then ## execute this block if condition is true else go to next else ## if none of the above conditions are true, execute this block fi ...