Comparison Operators
Explore how to use JavaScript comparison operators including hard and soft equality, inequalities, and relational operators. Understand their differences, type coercion issues, and best practices for accurate value comparisons in programming.
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We often need to compare values when programming, and there’s a number of ways to do this.
Equality
The equality operator can be used to check if two values are equal to each other. Most programming languages use the double-equals operator (==) to check for equality.
For example, if we wanted to know if the variable answer is , we could write:
answer == 42;
This would return true if the answer was and false if it wasn’t.
Why double-equals and not a single equals sign? Recall that we learned that the single equals sign was used for assignment. This means that the following code will assign the value of 42 to the variable answer, rather than check if they are equal:
answer = 42;
Assigning values instead ...