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HTML COMPUTER PROGRAMMING COMPUTER SCIENCE PROGRAMMING JAVASCRIPT
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Javascript functions
Write a JavaScript function to calculate difference of square values of two numbers passed as function arguements and to display the absolute value of it in an alert box.
<script>
function v(5,3){
var a =5 ;
var b =3;
var r =(a*a)-(b*b);
var s = Math.abs(r);
alert("Absolute value = "+s);
}
Why this is not working?
Is var = to variable? If so just fill it in with the letter, just like if you were to find out a algerbraic expression example: 4(A+B)=C
A=3
B= 7
C= 40
You would just fill in the blanks and write it out. When you talk about absoulte value, it is how far a numble is from 0 example: 21= the absoulte value of |21| also equal to |-21| they are both the same distance from 0. Does this give you an idea on how to solve it?
The code you provided has some syntax errors and is not structured correctly. Let me explain and correct it for you.
In JavaScript, you need to define a function using the `function` keyword, followed by the function name and a pair of parentheses that can hold parameters (arguments) if needed. In your case, you want to calculate the difference of square values of two numbers passed as arguments.
Here's the corrected code:
```javascript
function calculateDifferenceOfSquares(a, b) {
var result = (a * a) - (b * b);
var absoluteValue = Math.abs(result);
alert("Absolute value = " + absoluteValue);
}
calculateDifferenceOfSquares(5, 3);
```
Let me explain each part of the code:
- The `function calculateDifferenceOfSquares(a, b)` line defines the function `calculateDifferenceOfSquares` that takes two parameters `a` and `b`.
- Inside the function, we calculate the difference of square values using `(a * a) - (b * b)` and store it in the `result` variable.
- Then, we calculate the absolute value of `result` using `Math.abs(result)` and store it in the `absoluteValue` variable.
- Finally, we use the `alert` function to display the result in an alert box.
To test the function, we call it with `calculateDifferenceOfSquares(5, 3)`, passing 5 and 3 as the values for `a` and `b` respectively.
Keep in mind that this code should be placed within an HTML `<script>` tag or in an external JavaScript file.