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<!DOCTYPE html> <html lang="en-US"> <body> <script> document.write(Number.isSafeInteger(25) +": 25 <br>"); document.write(Number.isSafeInteger(-987)+": -987 <br>"); document.write(Number.isSafeInteger(54 - 7)+": 54 - 7 <br>"); document.write(Number.isSafeInteger(Math.pow(2, 53) - 1)+": Math.pow(2, 53) - 1 <br><br>"); document.write(Number.isSafeInteger(Math.pow(2, 53))+": Math.pow(2, 53) <br>"); document.write(Number.isSafeInteger(5.2)+": 5.2 <br>"); document.write(Number.isSafeInteger(-25.5)+": -25.5 <br>"); document.write(Number.isSafeInteger(0 / 0)+": 0 / 0 <br>"); document.write(Number.isSafeInteger(true)+": true <br>"); document.write(Number.isSafeInteger(false)+": false <br>"); document.write(Number.isSafeInteger('65')+": '65' <br>"); document.write(Number.isSafeInteger([5])+": [5] <br>"); document.write(Number.isSafeInteger(Infinity)+": Infinity <br>"); document.write(Number.isSafeInteger(-Infinity)+": -Infinity <br>"); document.write(Number.isSafeInteger(null)+": null <br>"); </script> </body> </html>
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