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<!DOCTYPE html> <html> <body> <script> var a = Number.isNaN(1993) //false var b = Number.isNaN(-19.93) //false var c = Number.isNaN(50-20) //false var d = Number.isNaN(0) //false var e = Number.isNaN("1993") //false var f = Number.isNaN("JavaScript") //false var g = Number.isNaN("2016/03/03") //false var h = Number.isNaN("") //false var i = Number.isNaN(true) //false var j = Number.isNaN(undefined) //false var k = Number.isNaN("NaN") //false var l = Number.isNaN(NaN) //true var m = Number.isNaN(0 / 0) //true document.write(a + "<br>"); document.write(b + "<br>"); document.write(c + "<br>"); document.write(d + "<br>"); document.write(e + "<br>"); document.write(f + "<br>"); document.write(g + "<br>"); document.write(h + "<br>"); document.write(i + "<br>"); document.write(j + "<br>"); document.write(k + "<br>"); document.write(l + "<br>"); document.write(m + "<br>"); </script> </body> </html>
<!DOCTYPE html> <html> <body> <script> var a = Number.isNaN(1993) //false var b = Number.isNaN(-19.93) //false var c = Number.isNaN(50-20) //false var d = Number.isNaN(0) //false var e = Number.isNaN("1993") //false var f = Number.isNaN("JavaScript") //false var g = Number.isNaN("2016/03/03") //false var h = Number.isNaN("") //false var i = Number.isNaN(true) //false var j = Number.isNaN(undefined) //false var k = Number.isNaN("NaN") //false var l = Number.isNaN(NaN) //true var m = Number.isNaN(0 / 0) //true document.write(a + "<br>"); document.write(b + "<br>"); document.write(c + "<br>"); document.write(d + "<br>"); document.write(e + "<br>"); document.write(f + "<br>"); document.write(g + "<br>"); document.write(h + "<br>"); document.write(i + "<br>"); document.write(j + "<br>"); document.write(k + "<br>"); document.write(l + "<br>"); document.write(m + "<br>"); </script> </body> </html>