Math.random

' Math.random() restituisce un numero casuale compreso tra 0 (incluso) e 1 (esclusivo):

https://www.w3schools.com/js/tryit.asp?filename=tryjs_math_random

<!DOCTYPE html>
<html>
<body>

<h2>JavaScript Math.random()</h2>

<p>Math.random() returns a random number between 0 and 1:</p>

</body>
</html>

'JavaScript Math Constants
'Math.E: 2.718281828459045
'Math.PI: 3.141592653589793
'Math.SQRT2: 1.4142135623730951
'Math.SQRT1_2: 0.7071067811865476
'Math.LN2: 0.6931471805599453
'Math.LN10: 2.302585092994046
'Math.LOG2E: 1.4426950408889634
'Math.Log10E: 0.4342944819032518

https://www.w3schools.com/js/tryit.asp?filename=tryjs_math_constants

<!DOCTYPE html>
<html>
<body>

<h2>JavaScript Math Constants</h2>

</body>
</html>

' Oppure
' Math.floor(Math.random() * 11);      // returns a random integer from 0 to 10
' Math.floor(Math.random() * 100);     // returns a random integer from 0 to 99
' Math.floor(Math.random() * 10) + 1;  // returns a random integer from 1 to 10

' Ogni volta che fai clic sul pulsante, getRndInteger (min, max) restituisce un numero casuale compreso tra 0 e 9 (entrambi inclusi):

https://www.w3schools.com/js/tryit.asp?filename=tryjs_random_function

<!DOCTYPE html>
<html>
<body>

<h2>JavaScript Math.random()</h2>

<p>Every time you click the button, getRndInteger(min, max) returns a random number between 0 
and 9 (both included):</p>

<button onclick="document.getElementById('demo').innerHTML = getRndInteger(0,10)">Click Me</button>

</body>
</html>

' Math.random() restituisce un numero casuale compreso tra 0 (incluso) e 1 (esclusivo):

https://www.w3schools.com/js/tryit.asp?filename=tryjs_math_random

<!DOCTYPE html>
<html>
<body>

<h2>JavaScript Math.random()</h2>

<p>Math.random() returns a random number between 0 and 1:</p>

<p id="demo"></p>

<script>
document.getElementById("demo").innerHTML = Math.random();
</script>

</body>
</html>

'JavaScript Math Constants

'Math.E: 2.718281828459045

'Math.PI: 3.141592653589793

'Math.SQRT2: 1.4142135623730951

'Math.SQRT1_2: 0.7071067811865476

'Math.LN2: 0.6931471805599453

'Math.LN10: 2.302585092994046

'Math.LOG2E: 1.4426950408889e'4

'Math.Log10E: 0.4342944819032518

https://www.w3schools.com/js/tryit.asp?filename=tryjs_math_constants

<!DOCTYPE html>
<html>
<body>

<h2>JavaScript Math Constants</h2>

<p id="demo"></p>

<script>
document.getElementById("demo").innerHTML =
"<p><b>Math.E:</b> " + Math.E + "</p>" +
"<p><b>Math.PI:</b> " + Math.PI + "</p>" +
"<p><b>Math.SQRT2:</b> " + Math.SQRT2 + "</p>" +
"<p><b>Math.SQRT1_2:</b> " + Math.SQRT1_2 + "</p>" +
"<p><b>Math.LN2:</b> " + Math.LN2 + "</p>" +
"<p><b>Math.LN10:</b> " + Math.LN10 + "</p>" +
"<p><b>Math.LOG2E:</b> " + Math.LOG2E + "</p>" +
"<p><b>Math.Log10E:</b> " + Math.LOG10E + "</p>";
</script>

</body>
</html>

' Oppure

' Math.floor(Math.random() * 11); // returns a random integer from 0 to 10

' Math.floor(Math.random() * 100); // returns a random integer from 0 to 99

' Math.floor(Math.random() * 10) + 1; // returns a random integer from 1 to 10

' Ogni volta che fai clic sul pulsante, getRndInteger (min, max) restituisce un numero casuale compreso tra 0 e 9 (entrambi inclusi):

https://www.w3schools.com/js/tryit.asp?filename=tryjs_random_function

<!DOCTYPE html>
<html>
<body>

<h2>JavaScript Math.random()</h2>

<p>Every time you click the button, getRndInteger(min, max) returns a random number between 0
and 9 (both included):</p>

<button onclick="document.getElementById('demo').innerHTML = getRndInteger(0,10)">Click Me</button>

<p id="demo"></p>

<script>
function getRndInteger(min, max) {
return Math.floor(Math.random() * (max - min)) + min;
}
</script>

</body>
</html>