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Java — Which is a valid declaration of a float value?

Difficulty: Easy

float f = 1F;
float f = 1.0;
float f = "1";
float f = 1.0d;

Correct Answer: float f = 1F;

Explanation:

Introduction / Context:
This evaluates the correct way of declaring floating-point literals in Java.

Concept / Approach:

By default, floating literals like 1.0 are treated as double in Java.
To assign to a float, append f or F.
d or D indicates double explicitly.
String literals like "1" cannot be assigned directly to float.

Step-by-Step:

Option A: Correct. "1F" explicitly declares a float.Option B: Incorrect. 1.0 defaults to double.Option C: Invalid type mismatch.Option D: Declares double literal with d.

Final Answer:
float f = 1F;

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