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-2.2.1.78	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.77	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.76	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.75	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.74	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.73	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.72	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.71	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.70	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.69	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.68	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.67	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.66	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.65	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.64	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.63	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.62	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.61	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.60	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.59	tracks/php/exercises/collatz-conjecture/example.php