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Converting to int or float: If you have a string "5" or "9.32", it can be converted to an int or float that mathematical operations can be performed on by adding 0 (for ints) or 0. (for floats) to the string. "5"+0 results in the int 5. "9.32"+0. results in the float 9.32000.转载地址:http://apiqb.baihongyu.com/