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echo substr($str, strpos($str, 'de'), $m), "\n";
?></lang>
=={{header|PowerShell}}==
Since .NET and PowerShell use zero-based indexing, all character indexes have to be reduced by one.
<lang powershell># test string
$s = "abcdefgh"
# test parameters
$n, $m, $c, $s2 = 2, 3, [char]'d', $s2 = 'cd'
# starting from n characters in and of m length
# n = 2, m = 3
$s.Substring($n-1, $m) # returns 'bcd'
# starting from n characters in, up to the end of the string
# n = 2
$s.Substring($n-1) # returns 'bcdefgh'
# whole string minus last character
$s.Substring(0, $s.Length - 1) # returns 'abcdefg'
# starting from a known character within the string and of m length
# c = 'd', m =3
$s.Substring($s.IndexOf($c), $m) # returns 'def'
# starting from a known substring within the string and of m length
# s2 = 'cd', m = 3
$s.Substring($s.IndexOf($s2), $m) # returns 'cde'</lang>
=={{header|Python}}==
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