Detailed explanation of float to int accuracy on PHP official website

This article mainly shares with you the detailed explanation of float to int conversion accuracy on the PHP official website. I hope it can help you.

<?php
echo (int) ( (0.1+0.7) * 10 ); // 显示 7!
?>

Due to the precision problem of floating point numbers, 0.1+0.7=0.799999..., after ×10, we get 7.9..., the mantissa is removed when converting float to int, so the result is 7.

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