Fortran Understanding the Meaning of "opr" in dp_reduce(array, "opr")

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The discussion revolves around understanding the term "opr" in the context of the Fortran function "dp_reduce(array, 'opr')." The original poster seeks guidance on where to find information about what "opr" represents without receiving a direct answer. A response highlights the need for more context regarding the specific program being referenced, noting that "dp_reduce()" does not seem to be a standard Fortran function and that a Google search yielded limited results, indicating a lack of widely available information on the topic.
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Please do not give me the answer but if you can direct me to site that will tell me what OPR represent in the statement dp_reduce(array, "opr"). I think opr represent operation but I need to find out what it does in this statement. Please don't give me the answer-just direct me to the right site to learn more about this.

thanks in advance
 
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I think you need to give more information about the program that you are working on. dp_reduce() doesn't appear to be a standard Fortran function. I did a Google search for '"dp_reduce" fortran' and got exactly two hits, one of which is this thread!
 

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