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JavaScript

Posted by Desmond Dallas
Desmond Dallas
6,985 Points

Explanation for code

Can someone please explain the following line. Im not quite sure why the secret number is set to 10: parseInt (secretNumber, 10);

<!DOCTYPE>

<html lang="en"> <head> <title>Chapter 3, Example 3</title> </head> <body> <!--This code can be guessed for a guesses the correct answer--> <script> var secretNumber = prompt ("Pick a number between 1 and 5:", ""); secretNumber = parseInt (secretNumber, 10);

    switch (secretNumber) {

    case 1:
        document.write("Too low!");
        break;

    case 2:
        document.write("Too low!");
        break;

    case 3:
        document.write("You guessed the secret number!");
        break;

    case 4:
        document.write("Too high!");
        break;

    case 5:
        document.write("Too high!");
        break;

/* The default can be used to pick up bugs quickly. If it runs when it shouldnt be you have a bug*/ default: document.write("You did not enter a number between 1 and 5."); break; }

document.write("<br />Execution continues here"); </script> </body> </html>

2 Answers

Steven Parker
Steven Parker
243,658 Points
Steven Parker
Steven Parker
243,658 Points

The 2nd argument to "parseInt" determine what numeric radix will be used when converting the digits. The number "10" means to use the decimal system. This is also the default used when only one argument is given.

The actual number returned by the conversion will be the numeric representation of what the user typed in answer to the prompt.

Desmond Dallas
Desmond Dallas
6,985 Points
Desmond Dallas
Desmond Dallas
6,985 Points

Great thank you for the reply