Validate key in mapping

paulocarrillopenapaulocarrillopena Member Posts: 1
Good morning / afternoon / night:
i'm using a mapping(address=>uint) addressMapping and i would like to know if there is any way to validate if an address is contained in the mapping not only checking like this if (addressMapping[element] > 0) because in this case there could be valid an element like this: addressMapping[element]==0
Thank you very much for any help
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