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13 February, 07:18

Assume that x is a char variable that has been declared and already given a value. Write an expression whose value is true if and only if x is alphanumeric, that is either a letter or a decimal digit.

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  1. 13 February, 07:44
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    In Java, the character class has both an isDigit method and an isLetter method.

    if (Character. isDigit (a) || Character. isLetter (a)) {

    return true;

    } else {return fase; }
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