Contents

<?php

function steps($number)
{
    $stepCount = 0;
    if ($number < 1) {
        throw new InvalidArgumentException('Only positive numbers are allowed');
    }
    do {
        if ($number === 1) {
            break;
        }
        $stepCount++;
        $number = ( $number % 2 === 0 ? $number / 2 : 3 * $number + 1);
    } while ($number !== 0);

    return $stepCount;
}

Version data entries

134 entries across 134 versions & 1 rubygems

Version	Path
trackler-2.2.1.180	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.179	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.178	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.177	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.176	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.175	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.174	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.173	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.172	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.171	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.170	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.169	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.167	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.166	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.165	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.164	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.163	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.162	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.161	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.160	tracks/php/exercises/collatz-conjecture/example.php