Float Literals Must Use f Suffix

When specifying literals of type double, you don’t need a suffix.  All floating point literals are by default assumed to be of type double.

1	double d1 = 4.2;    // This works

But when specifying float literals, you need an explicit cast, or the f suffix.

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// 4.2 literal is inferred as double float f = 4.2;   // Compilation error: Literal of type double cannot be implicitly converted to type 'float'   // Two ways to fix this float f2 = (float)4.2;      // double explicitly cast to float float f3 = 4.2f;            // 'f' indicates that literal is float

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