Python & Perl: Basic String Operations

2005-01-10

Python

In Python, strings can be joined by a plus sign +.

print "this" + " that"

String can be repeated using *

print "this" * 2

Substring extraction is done by appending a bracket with begin and ending index

a="this and that"
print a[3:6]

The index can be negative, which counts from the end

a="this and that"
print a[3:-2]

Length of the string is len()

a="this and that"
print len(a)

In Perl, string join is done with a dot.

$astr= "this" . "that";

String repeatition is done with the x operator:

print 'abc' x 2;

String extraction is done with substr(). The form is: substr($myString, offset index, number of characters to extract).

print substr('abcdefg',2,3); # prints cde

Length of string is length();

print length('abc');

See also:

Page created: 2005-01.
© 2005 by Xah Lee.