Array length

len

length

count

• Count all elements in an array

1 Bash

systems=("Solar System" "Alpha Centauri" "Barnard's Star")
echo ${#systems[@]}
# 3
echo ${#systems[*]}
# 3

2 C#

string[] weekDays2 = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
MessageBox.Show(weekDays2.Length);
// shows 7

3 Java

String[] weekDays2 = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
System.out.println(weekDays2.length);
// shows 7

4 JavaScript

var weekDays2 = [ "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" ];
document.write(weekDays2.length);
// shows 7

5 Objective-C

NSArray *weekDays2 = [NSArray arrayWithObjects:@"Sun", @"Mon", @"Tue", @"Wed", @"Thu", @"Fri", @"Sat", nil];
NSLog(@"%lu", [weekDays2 count]);
// shows 7

6 Perl

@nums = (1,2,3,4);
print scalar(@nums);
# shows 4

7 PHP

$nums = array(1,2,3,4);
echo count($nums);
// shows 4

8 Python

nums = [1,2,3,4]
print len(nums)
# shows 4

9 Ruby

nums = [1,2,3,4]
puts nums.size
# shows 4

10 See also

• string_length
• print_r
• get_last_element