how to compare special characters in string

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I have a strings
string='$(0)parameter'
I want to find if '$' is present in the string or not. Can any one tell me how to do that? Using which string functions I can achieve that?
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Accepted Answer

Sara
Sara on 10 Jul 2014
If index is empty, $ is not in the string
str='$(0)parameter';
index = strfind(str,'$');
  1 Comment
ananth a
ananth a on 27 Nov 2019
if I want to search with '$(0)'. how can i do that?
Because i have to search with {"some name": value, this part.

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