JS Practice — Built-in Objects

Number.parseFloat() — empty string returns NaN

📖 Usage Example

// Parse a string to a floating-point number
Number.parseFloat('3.14')      // → 3.14
Number.parseFloat('3.14abc')   // → 3.14 (stops at first non-numeric)
Number.parseFloat('abc')       // → NaN

Use Number.parseFloat() to convert a string to a decimal number, stopping at the first character that is not part of a valid number.

Number.parseFloat() — Empty String

An empty string or a string with no parseable digits returns NaN.

💡 Hints (1)

• When there are no leading numeric characters to parse, the result is `NaN`.