Where value is to be checked. The method returns true if the value passed to it is NaN, and false otherwise.
true false true
isInteger() Method: The isInteger() method is used to determine if a value is an integer. An integer is a whole number (positive, negative, or zero) that does not have any fractional part.
Where value is the value to be checked. The method returns true if the value passed to it is an integer and false otherwise.
true false false
Difference between isNaN() and isInteger():
|Purpose||To check if a value is NaN.||To check if a value is an integer.|
|Returns||true if the value is NaN, false otherwise.||true if the value is an integer, false otherwise.|
|Handles non-numeric values||Returns true for any non-numeric value, including strings, arrays, and objects.||Only returns true for integer values.|
Summary: The main difference between isNaN() and isInteger() functions is that isNaN() checks if a value is NaN, while isInteger() checks if a value is an integer. When to use them depends on what type of value you want to check for, whether it is NaN or an integer. These functions are useful for ensuring that the values you are working with are of the expected type, leading to more robust and reliable programs. Always use the appropriate function based on your specific requirements.
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