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  1. <?php
  2.  
  3.     function scientificNotation($val){
  4.         $exp = floor(log($val, 10));
  5.         return sprintf('%.2fE%+03d', $val/pow(10,$exp), $exp);
  6.     }
  7.  
  8. echo scientificNotation(5.1)."\n";
  9. echo scientificNotation(50.1)."\n";
  10. echo scientificNotation(500.1)."\n";
  11. echo scientificNotation(0.0051)."\n";
Success #stdin #stdout 0.01s 20568KB
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5.10E+00
5.01E+01
5.00E+02
5.10E-03
https://ideone.com/2E84dZ
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
secret

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