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lib/PhpSpreadsheet/Style/NumberFormat/Wizard/Scientific.php

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+<?php
+
+namespace PhpOffice\PhpSpreadsheet\Style\NumberFormat\Wizard;
+
+use PhpOffice\PhpSpreadsheet\Exception;
+
+class Scientific extends NumberBase implements Wizard
+{
+    /**
+     * @param int $decimals number of decimal places to display, in the range 0-30
+     * @param ?string $locale Set the locale for the scientific format; or leave as the default null.
+     *          Locale has no effect for Scientific Format values, and is retained here for compatibility
+     *              with the other Wizards.
+     *          If provided, Locale values must be a valid formatted locale string (e.g. 'en-GB', 'fr', uz-Arab-AF).
+     *
+     * @throws Exception If a provided locale code is not a valid format
+     */
+    public function __construct(int $decimals = 2, ?string $locale = null)
+    {
+        $this->setDecimals($decimals);
+        $this->setLocale($locale);
+    }
+
+    protected function getLocaleFormat(): string
+    {
+        return $this->format();
+    }
+
+    public function format(): string
+    {
+        return sprintf('0%sE+00', $this->decimals > 0 ? '.' . str_repeat('0', $this->decimals) : null);
+    }
+}