#   
## Overview

A **`BLOCK`** in Perl is a collection of statements enclosed inside curly brackets. 

A `BLOCK` can be labeled or unlabeled. Regardless, it is treated as a loop that executes once.

## Syntax

---
``` perl
LABEL: {
  statement1
  statement2
  .
  .
  .
  statementN
}
```
---

> Here, `statement1`, `statement2` and `statementN` are placeholders for actual Perl statements.

#    
## Code

There are several use cases of the basic `BLOCK` in `Perl`. This shot looks at a few of them.

## `Switch` example

The following example uses the `BLOCK` as a `switch` construct.

$x = 10;

SWITCH: {
    if ($x > 10) { print "Greater than 10"; last SWITCH }
    if ($x < 10) { print "Less than 10"; last SWITCH }
    if ($x == 10) { print "Equal to 10"; last SWITCH }
}

## Explanation

In the example above, the variable `x` is initialized with the value `10`. The `SWITCH` `BLOCK` contains three `if` statements that compare the value of `x` with `10`. 

If the comparison yields `true`, then the relevant text is output on the screen and the `SWITCH` `BLOCK` is exited.

## `Loop` example

The following example uses the `BLOCK` as a `loop`.

$i = 0;

LOOP: {
  print "Loop iteration $i\n";
  $i = $i + 1;
  if ($i < 5) { redo; }
}

## Explanation

In the example above, the variable `i` is initialized with the value `0`, which will be used to control the number of loop iterations. 

Inside the `LOOP` `BLOCK`, the value of `i` is printed and then incremented. If the value of `i` is less than `5`, then `redo` is used to re-execute the `LOOP` `BLOCK`.

What are basic BLOCKs in Perl 5.3.4?

A BLOCK in Perl is a set of statements in curly brackets, used as loops, switches, or other constructs.

What are basic BLOCKs in Perl 5.3.4?

Overview

Syntax

Code

Switch example

Explanation

Loop example

Explanation

`Switch` example

`Loop` example