Conditional Control Statements : If « Statement « Perl

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Perl » Statement » If

Conditional Control Statements


   



#    if (Expression) {Code Segment}

#    if (Expression) {Code Segment} else {Code Segment}

#    if (Expression) {Code Segment} elsif {Code Segment} ... else {Code Segment}



    #!/usr/local/bin/perl -w



    while (<STDIN>)

    {

       chomp;



       if ($_ < 10)

       {

          print "$_ is less than 10.\n";

       }

       elsif ($_ < 20)

       {

          print "$_ is between the values of 10 and 19.\n";

       }

       else

       {

          print "$_ is greater than or equal to 20.\n";

       }

    }

Related examples in the same category

1.	A program containing a simple example of an if statement.
2.	A program that uses the if-else statement.
3.	A program that uses the if-elsif-else statement.
4.	Conditional Modifiers and print
5.	Conditional Modifiers: The if Modifier
6.	Extend the if statement to include an else block
7.	If and else
8.	If start with - no repeat
9.	If statement and integer comparsion
10.	If statement in a while statement
11.	If statement ladder
12.	If statement with else
13.	If statement with scalar variable
14.	Nest if statement into for loop
15.	Perl has a number of string comparison operators you can use in if statements.
16.	Plural format and ternary operator
17.	Plural message
18.	Plural output with if statement
19.	The if Construct
20.	The if/else Construct
21.	The if/elsif/else Construct
22.	Use an elsif statement to check if a different condition is true
23.	Use if statement to check the integer value
24.	Using if statement to check if a variable has been defined
25.	Using if statement to check if a variable is zero
26.	Using if statement to check the number entered from keyboard
27.	Using if statements with relational and equality operators
28.	Using the equality-comparison operator to compare two numbers entered at the keyboard.
29.	Using the if elsif statement to check the number entered from keyboard
30.	if in a while loop
31.	if scope
32.	if statement
33.	if/else statement
34.	if/elsif statement

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