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<h3>left() function</h3>
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Returns a substring that contains the <i>n</i> leftmost characters of the string.
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<h4>Syntax</h4>
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<code>left(string, length)</code><br>
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<h4>Arguments</h4>
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<code>string</code> - is string. The string.
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<br>
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<code>length</code> - is int. The number of characters from the left to return.
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<h4>Example</h4>
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<!-- Show example of function.-->
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<code>left('Hello World',5) → 'Hello'</code><br>
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