function mySin(x, iterNum) {

 // Define variables

 let mxx = -x*x, sin = 1,

 n = 0, term = 1;

 for (let i = 1; i <= 2*iterNum; i++) { // Loop

  n = n + 2;

  term = term * mxx / ( n * (n + 1) );

  sin += term;

 }

 return x*sin;

}

​

function setup() {

 createCanvas(400, 200);

 background(220);

 // Define the value to evaluate

 let x = 2;

 // Number of terms on Taylor's expansion 

 let numbTerms = 1; 

​

 // Call my sin function

 let tempSin = mySin(x, numbTerms);

 // Call the JavaScript built-in function

 let jsSin = sin(x);

​

 textSize(24);

 // Shows the value I want to evaluate

 text('For x = '+ x + ' with ' + numbTerms + ' term(s) ', 10, 50); 

 // Shows my sin value

 text('My Sin: '+ tempSin, 10, 90);

 // Shows the JavaScript built-in sin value

 text('  js Sin: '+ jsSin, 10, 130);

}