If

Run code depending on whether a boolean condition is true or false.

if(true) {}

The code inside the if block only runs when the condition block is true. You can compare variables to values or variables to variables, for a true condition.

let reward = false;let perfect = 0;let myScore = 0;if (myScore < 10) {    myScore += 1;}if (myScore == perfect) {    reward = true;}

Opposite condition: else

If you want some other code to run when the opposite condition is true, you put it in an additional block area called else.

let colorMix = 0;let favColor = "orange";if (favColor == "blue"){    colorMix = 7;} else {    colorMix = 472;}

Opposite condition, but check something again: else if

Another conditional action is to add an if to an else for an else if. It works like this:

let reward = false;let nearPerfect = 0let perfect = 0let myScore = 0;if (myScore < 10) {    myScore += 1;}if (myScore == perfect) {    reward = true;} else if (myScore == nearPerfect) {    reward = true;}

You might guess that a longer way of saying the same thing is this:

let reward = false;let nearPerfect = 0;let perfect = 0;let myScore = 0;if (myScore < 10) {    myScore += 1;}if (myScore == perfect) {    reward = true;} else {    if (myScore == nearPerfect) {        reward = true;    }}

Example: adjusting screen brightness

If the light level is < 100, this code sets the brightness to 255 when the button A is pressed:

input.onButtonPressed(Button.A, () => {    if(input.lightLevel()<100){        led.setBrightness(255);    }})