Function
Introduction to the JavaScript parseInt() Function
The parseInt() function in JavaScript is an important part of the language and is used to convert strings and numbers to an integer value. It is an essential tool for working with numerical values, and it is a powerful tool for manipulating strings.
Syntax of the parseInt() Function
The syntax of the parseInt() function is as follows:
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parseInt(string, radix);
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Where string is the string to be converted and radix is an optional argument that specifies which numerical base system to use. If the radix argument is not provided, the default base system is 10.
Using parseInt() With a Radix
When the radix argument is provided, the parseInt() function will attempt to parse the string using that base system. The following table shows how the radix argument affects the numerical value of the string:
| Radix | String value |
|---|---|
| 2 | binary |
| 8 | octal |
| 10 | decimal |
| 16 | hexadecimal |
For example, if the string argument is "10" and the radix argument is 2, the parseInt() function will return the binary value of 2. Similarly, if the string argument is "10" and the radix argument is 16, the parseInt() function will return the hexadecimal value of 16.
Using parseInt() Without a Radix
When the radix argument is not provided, the parseInt() function will attempt to parse the string using the default base system of 10. The following table shows how the default base system affects the numerical value of the string:
| String value | Numerical value |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 10 | 10 |
| 100 | 100 |
For example, if the string argument is "10", the parseInt() function will return the decimal value of 10. Similarly, if the string argument is "100", the parseInt() function will return the decimal value of 100.
Conclusion
The parseInt() function in JavaScript is an important and powerful tool for working with numerical values and strings. It can be used to convert strings to integers, and it can also be used to parse strings using a specified base system. It is an essential part of the language and should be used whenever possible.
