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<?php // 数字の文字列に対する総和を計算する function calculateSum(string $param) : string { $su = (int)$param; $res = 0; for ($i = 1; $i <= $su; $i++) { $res += $i; } if ($su <= 0) { return "ERROR"; } return (string)$res; } var_dump(calculateSum('10'));
Output for git.master, git.master_jit, rfc.property-hooks
string(2) "55"

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