C#.NET — choose the valid ways to convert a Single (float) to a String.
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As = (String)(f);
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Bs = Convert.ToString(f);
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Cs = f.ToString();
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Ds = Clnt(f);
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Es = CString(f);
Answer
Correct Answer: s = Convert.ToString(f);
Explanation
Introduction / Context:Converting numeric types to strings is routine in C#.NET. The question presents several code snippets and asks which are valid for converting a Single (alias float) into a String.
Given Data / Assumptions:
Single f = 9.8f;then assign astringvariables.- Snippets may include syntax from other languages or invalid casts.
Concept / Approach:In C#, use Convert.ToString or the instance ToString() method. Direct casting from float to string is illegal, and VB-specific functions like CString or Clnt do not exist in C#.
Step-by-Step Solution:
Valid:s = Convert.ToString(f); → uses framework converter.Valid: s = f.ToString(); → instance method on value type.Invalid: (String)(f) → no direct cast defined.Invalid: Clnt and CString → VB-style; not C# identifiers.Verification / Alternative check:Try formatting: f.ToString("F2") for 2 decimal places, demonstrating rich formatting support.
Why Other Options Are Wrong:They are either syntactically invalid in C# or rely on non-existent conversion helpers.
Common Pitfalls:Assuming a C-style cast will work for disparate types like float to string.
Final Answer:s = Convert.ToString(f); (also acceptable: s = f.ToString();)