If you want to convert continuous data into categorical data in SAS, can you just use formats? Or does formats not change the actual variable?
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How exactly do you want to convert the data? Are you trying to categorize it as @TARehman mentioned?
As far as I know, you should only convert your continuous data to categorical data with caution if it's really necessary (e.g. chi-square test). If you are indeed trying to categorize (bin) your continuous variable into categorical variable, a careful preliminary analysis should be conducted because the range and spread may alter and be sensitive to test statistics.
Back to your question, as @TARehman mentioned, SAS format function will only change the attribute of the variable.