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-2.2.1.159	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.158	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.157	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.156	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.155	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.154	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.153	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.152	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.151	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.150	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.149	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.148	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.147	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.146	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.145	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.144	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.143	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.142	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.141	tracks/php/exercises/collatz-conjecture/example.php
trackler-2.2.1.140	tracks/php/exercises/collatz-conjecture/example.php