问题
Im not sure what this type of number is '1.3122278540256E+18' but how can i expand it into an integer?
Thanks!!
回答1:
That's a floating-point number expressed in scientific notation (the "E+18" means "times 10 to the 18th power"). Chances are it's being displayed that way due to its length; you might try using printf to format it as a standard integer.
回答2:
It is in IEEE floating point notation. It is a number too large to be calcuated exactly, but move the decimal +18 places to the right to get the integer.
回答3:
This is scientific notation.
E+18 is shorthand for 10^18. In this case, the number you see is 1,312,227,854,025,600,000.
来源：https://stackoverflow.com/questions/1863461/php-convert-to-int