'indexOf()' Syntax, Parameters and Note : indexOf « Javascript Methods « JavaScript Reference

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3. indexOf

'indexOf()' Syntax, Parameters and Note

Note:

This method performs a search for the specified string and 
returns the character number in the string at which the 
match starts. 
If no match is found, it returns -1.
    
Syntax:
    
stringName.indexOf(param1, param2)

Parameters:
    param1   Required; the string to search for.
    param2   Optional; the character number in the string at which to start the search.

    

      
      

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