Lecture 130:- Type Coercion - Some Unexpected Answers

Type coercion is the automatic conversion of a value from one data type to another data type. This can sometimes lead to unexpected results, especially when dealing with different data types.

For example, consider the following code:

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console.log(5 + "5");

The expected output might be 10, since 5 added to 5 is 10. However, the actual output will be 55. This is because the + operator is used both for addition and concatenation, and when one of the operands is a string, JavaScript will convert the other operand to a string and concatenate the two strings together.

Similarly, consider the following code:

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console.log("5" == 5);

The expected output might be true, since 5 and "5" have the same value. However, the actual output will be true, because JavaScript will perform type coercion and convert the string "5" to the number 5 before comparing the two values.

These examples highlight the importance of understanding type coercion in JavaScript, and being aware of the potential for unexpected results.