True and False
A Boolean variable has only two possible values: true or false. It is common to use Booleans with control statements to determine the flow of a program. In this example, when the boolean value "b" is true, vertical lines are drawn and when the boolean value "b" is false, horizontal lines are drawn.
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function setup() {
createCanvas(720, 400);
background(0);
stroke(255);
let b = false;
let d = 20;
let middle = width / 2;
for (let i = d; i <= width; i += d) {
b = i < middle;
if (b === true) {
// Vertical line
line(i, d, i, height - d);
}
if (b === false) {
// Horizontal line
line(middle, i - middle + d, width - d, i - middle + d);
}
}
}
