Game Lab Documentation

And Operator

Category:Math

More complex decisions sometimes require two things to be true. The && operator allows you to check if both operand expressions are true, and then possibly perform some specific action using an if, if-else, or while block.

// Truth table for the boolean AND operator.
console.log(true && true);
console.log(true && false);
console.log(false && true);
console.log(false && false);

Examples

Working 9 to 5

Determines if it is currently working hours.

// Determines if it is currently working hours.
var now = new Date();
var hours = now.getHours(); 
var workHours = false;
if (hours >= 9 && hours < 17) {
    workHours = true;
}
console.log(workHours);

Take Your Temperature

Check whether a given temperature is in a healthy range or not.

// Check for temperature in a good range or not.
textLabel("tempLabelID", "What is your temperature?");
textInput("tempID", "");
button("buttonID", "Submit");
textLabel("tempMessageID", "");
onEvent("buttonID", "click", function(event) {
  setText("tempMessageID","");
  var temp = getText("tempID");
  if (temp >= 98 && temp <= 99.5) {
    setText("tempMessageID", "Your temperature is fine.");
  }
  else {
    setText("tempMessageID", "You may be sick.");
  }
});

Syntax

__ && __

Parameters

Name	Type	Required?	Description
expression1	boolean		The first boolean expression to evaluate.
expression2	boolean		The second boolean expression to evaluate.

Returns

Boolean (true or false)

Tips

Some complex decisions using an && operator can sometimes be rewritten to use an || operator. It is fine to choose whichever reads clearest.

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