Round

This function rounds a floating point number to an integer value. If the floating number belongs to the number range of 2147483647 to -2147483648, you need to type cast the return value to integer.

If the floating number belongs to the number range of 2147483648 to 9223372036854775807 and -2147483649 to -9223372036854775808, type cast the return value to a big integer value.

Round(double) 

result=Round(2.5) ; result = 3 
result=Round(-2.5) ; result = -3