JSFiddle - React, Tailwind, and code Playground

JavaScript

document.write('<pre>');
print('Pi', Math.PI, '3.141592653589793');
br();
print('Math.cos(Math.PI/2)', Math.cos(Math.PI/2), '0');
document.write('</pre>');
function print(name, value, expected_value)
{
    document.write(name + ':\t' + value + '\nExpected:\t' + expected_value + '\n');
}
function br()
{
    document.write('\n');
}