FilesExpand file tree

main

/

calculator.js

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

64 lines (58 loc) · 2.24 KB

main

/

calculator.js

Copy path

Top

File metadata and controls

• Code
• Blame

64 lines (58 loc) · 2.24 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

function appendInput(value) {

const inputField = document.getElementById('input');

inputField.value += value;

}

function clearInput() {

document.getElementById('input').value = '';

document.getElementById('output').textContent = '';

}

function calculate() {

const inputField = document.getElementById('input');

const outputField = document.getElementById('output');

try {

let expression = inputField.value.replace('^', '**');

const result = eval(expression); // Use with caution in real-world applications

outputField.textContent = `Result: ${result}`;

} catch (error) {

outputField.textContent = 'Error: Invalid expression';

}

}

function factorial(n) {

if (n === 0 || n === 1) return 1;

return n * factorial(n - 1);

}

function calculateCombination() {

const inputField = document.getElementById('input').value;

const [n, r] = inputField.split(',').map(Number);

const outputField = document.getElementById('output');

if (n >= r && n >= 0 && r >= 0) {

const result = factorial(n) / (factorial(r) * factorial(n - r));

outputField.textContent = `nCr Result: ${result}`;

} else {

outputField.textContent = 'Error: Invalid inputs for nCr';

}

}

function calculatePermutation() {

const inputField = document.getElementById('input').value;

const [n, r] = inputField.split(',').map(Number);

const outputField = document.getElementById('output');

if (n >= r && n >= 0 && r >= 0) {

const result = factorial(n) / factorial(n - r);

outputField.textContent = `nPr Result: ${result}`;

} else {

outputField.textContent = 'Error: Invalid inputs for nPr';

}

}

function calculateDerivative() {

const inputField = document.getElementById('input').value;

const outputField = document.getElementById('output');

const h = 0.00001; // Small step for numerical differentiation

const x0 = parseFloat(prompt('Enter the value of x for differentiation:'));

if (!isNaN(x0)) {

const f = (x) => eval(inputField.replace(/x/g, `(${x})`));

const derivative = (f(x0 + h) - f(x0 - h)) / (2 * h);

outputField.textContent = `Derivative at x=${x0}: ${derivative}`;

} else {

outputField.textContent = 'Error: Invalid input for differentiation';

}

}