What are the differences between JavaScript's parseFloat() and parseInt()?
Davide S

JavaScript provides two methods for parsing numeric values:parseFloat() andparseInt(). While they are both used for converting strings to numbers, there are some differences in their behavior. Here are the main differences betweenparseFloat() andparseInt(): 1. Decimal numbers: -parseFloat() handles decimal numbers and returns a floating-point number with decimal precision. -parseInt() only returns the integer part of a number and truncates any decimal values.

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   parseFloat("3.14"); // Output: 3.14 (floating-point number)
   parseInt("3.14"); // Output: 3 (integer)

2. Number formats: -parseFloat() can handle both decimal and exponential notation. -parseInt() only handles decimal notation. If the string starts with0x or0X, it interprets the string as a hexadecimal number.

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   parseFloat("1.23e-4"); // Output: 0.000123 (floating-point number)
   parseInt("0xFF"); // Output: 255 (hexadecimal number)

3. Handling non-numeric characters: -parseFloat() andparseInt() differ in their handling of non-numeric characters in the input string. -parseFloat() parses the string until it encounters a non-numeric character, and it ignores any subsequent characters. -parseInt() stops parsing as soon as it encounters a non-numeric character, even if there are numeric characters following it.

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   parseFloat("123abc"); // Output: 123 (numeric value before the non-numeric character)
   parseInt("123abc"); // Output: 123 (numeric value before the non-numeric character)

4. Radix (forparseInt() only): -parseInt() accepts an optional second parameter called the radix, which specifies the base of the number being parsed. - If the radix is not specified,parseInt() assumes base 10. However, it can also handle other bases from 2 to 36.

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   parseInt("1010", 2); // Output: 10 (binary number)
   parseInt("FF", 16); // Output: 255 (hexadecimal number)

It's important to note that bothparseFloat() andparseInt() have some limitations and potential inconsistencies, especially when dealing with leading zeros or non-numeric characters. If you require more precise parsing or handling of specific formats, consider using external libraries or custom parsing logic tailored to your specific needs.

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