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Math.random()
returns a random number.
It returns a random number between 0 and a number lower than 1. Additional logic (like with Math.ceil()
will be needed to return a random integer.
Tip: Math.ceil()
and Math.random()
can be used together to return a
random number between 0 and 10.
let demo1 = document.getElementById("demo1");
demo1.innerHTML = "Random Number: " + (Math.ceil(Math.random() * 10));
http://www.w3schools.com/jsref/jsref_random.asp