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  1. <?php
  2. $n = 3;
  3.  
  4. var_dump($n * ($n - 1) / 2);
  5. var_dump($n / 2 * ($n - 1));
Success #stdin #stdout 0.01s 20520KB
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stdin
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Standard input is empty
stdout
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int(3)
float(3)
https://ideone.com/jAppjf
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
public

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