Question

Which of the following function will convert the data into number in JavaScript?

• A. parseNum()
• B. parseNumber()
• C. parseFloat()
• D. parseData()

Hint:

JavaScript commonly uses parseInt() for integers and parseFloat() for decimal numbers when converting strings into numeric values.

Answer 1

The Correct Option is C

Step 1: Understand type conversion in JavaScript.

JavaScript often needs to convert data from one type to another. For example, sometimes a value entered by the user is received as a string but needs to be converted into a number for mathematical calculations.

This process is called type conversion or type casting.

Step 2: Explain the parseFloat() function.

The parseFloat() function is a built-in JavaScript function used to convert a string value into a floating-point number. It reads the numeric part of a string and converts it into a number.

Example:

parseFloat("25.75")

Output will be:

25.75

This function is useful when numbers contain decimal values.

Step 3: Analyze other options.

parseNum(): This function does not exist in JavaScript.

parseNumber(): This is also not a valid JavaScript built-in function.

parseData(): This function is not used for numeric conversion in JavaScript.

Step 4: Conclusion.

Therefore, the correct function used to convert data into a number in JavaScript is parseFloat().