# Declaration, conversion, and calculation of float and double data types

Source: Internet
Author: User

When declaring, a number of parts of float must be added f/f, while Double does not

`The declaration of float will add F if it has a decimal part, otherwise it won't be private. Converts a double type to a float type.            float f1 = 1;//ok            float F2 = 1.1f;//Be sure to f            float f3 = 1.23F;            Double declaration does not need to add D            double d1 = 1;            Double D2 = 1.2;            Double d3 = 1.232434377777777;`

`The precision of double is higher than float,double to float for the display conversion, float to double is implicit conversion, and float can only show 6 for the decimal point, the rest is rounded f1 = (float) d3;//1.232435`

`           Console.WriteLine (5/8);//0 int/int=int decimal place is omitted            Console.WriteLine (5.0/8.0);//0.625 double/double=double            Console.WriteLine (5.0/8);//0.625 double/int=double            Console.WriteLine (5f/8f);//0.625 float/float=float            Console.WriteLine (5d/8d);//0.625 double/double=double            Console.WriteLine (1/3*3);//0            Console.WriteLine (1* 3/3);//1            Console.WriteLine (1.0/3*3);//1`

Declaration, conversion, and calculation of float and double data types

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