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Questions and Answers
What is the primary reason that the expression 5 == "5" evaluates to true in JavaScript?
What is the primary reason that the expression 5 == "5" evaluates to true in JavaScript?
- Both values are strictly equal.
- The numeric and string types are always considered equal.
- JavaScript does not support type comparison.
- JavaScript automatically converts them to a common type. (correct)
Which of the following terms best describes the process occurring in the expression 5 == "5"?
Which of the following terms best describes the process occurring in the expression 5 == "5"?
- Weak Type Comparison (correct)
- Strict Type Coercion
- Type Casting
- Dynamic Typing
What is NOT a characteristic of JavaScript's handling of different data types during comparison?
What is NOT a characteristic of JavaScript's handling of different data types during comparison?
- It always treats different types as equal when using `==`.
- It uses type coercion to make comparisons.
- It converts strings to numbers when compared with numbers.
- It throws an error if types do not match. (correct)
Which of the following would correctly describe the behavior of 5 === "5" in JavaScript?
Which of the following would correctly describe the behavior of 5 === "5" in JavaScript?
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What would be the result of using the comparison 5 == 5.0 in JavaScript?
What would be the result of using the comparison 5 == 5.0 in JavaScript?
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Study Notes
JavaScript Type Coercion
- The code demonstrates a concept in JavaScript called "Type Coercion"
- Type coercion is the automatic conversion of data types in JavaScript to enable comparisons and operations
- In this case, the
==operator triggers type coercion, converting the string"5"to a number5before comparing both values - While the values are of different data types, type coercion allows for comparison, resulting in
truebecause5 == 5is true.
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