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How to find the Total Number of Elements in an Array in TypeScript ?

Perl | Getting the Number of Elements of an Array

Last Updated : 18 Feb, 2019

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An array in Perl is a variable used to store an ordered list of scalar values. An array variable is preceded by an “at” (@) sign. The size of an array can be determined using the scalar context on the array which returns the number of elements in the array

Example 1:

   #!/usr/bin/perl 
  
# Initializing the array 
@a = (1, 2, 3); 
  
# Assigning the array to a scalar 
# variable which stores size of 
# the array 
$s = @a; 
  
# Printing the size 
print "Size of the Array is $s"; 
 
  

Output:

  Size of the Array is 3

Above code returns the physical size of the array, not the number of valid elements. In order to obtain the maximum index of an array, ‘$#’ is used as shown in the example below:

Example 2:

   #!/usr/bin/perl 
  
# Initializing the array 
@a = (1, 2, 3); 
  
# Store the value at any index 
# Let's take index 15 here, 
$a[15] = 20; 
  
# Printing the Array 
print "Array is @a"; 
  
# Getting the maximum index  
# of the array 
$i = $#a; 
  
# Printing the Max. Index 
print "\nMaximum index is $i"; 
 
  

Output:

  Array is 1 2 3             20  Maximum index is 15

Here is how the above code works:-
Step1: Initializing an array with some values
Step2: Assigning a value at any random index leaving the other indices blank
Step3: Printing the array to show the blank spaces left in the array
Step4: To get the maximum index ‘$#’ is used
Step5: Further, print the maximum index

How to find the Total Number of Elements in an Array in TypeScript ?

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Article Tags :

Perl
Perl-Arrays

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