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In C# I can convert doubles to floats by a cast (float) or by Convert.ToSingle().
double x = 3.141592653589793238463; float a = (float)x; float b = Convert.ToSingle(x); a and b become equal.
Are there any differences between both techniques? Which one should I prefer and why?
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Using TypeCasting to Convert Double to Float in Java To define a float type, we must use the suffix f or F , whereas it is optional to use the suffix d or D for double. The default value of float is 0.0f , while the default value of double is 0.0d . By default, float numbers are treated as double in Java.
ToSingle(Object) Converts the value of the specified object to a single-precision floating-point number. ToSingle(Int32) Converts the value of the specified 32-bit signed integer to an equivalent single-precision floating-point number.
In C# I can convert doubles to floats by a cast (float) or by Convert. ToSingle() . double x = 3.141592653589793238463; float a = (float)x; float b = Convert.
To convert a Double value to an integer value, use the Convert. ToInt32() method. Int32 represents a 32-bit signed integer.
From the .NET reference source:
public static float ToSingle(double value) { return (float)value; } So, your answer is that they are exactly the same, under the hood.
Any preference between the two is strictly a personal style choice. Personally, I would always use the cast as it is shorter and and just seems more idiomatic to me.
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