How Can I Use Multiple OR Conditions Correctly in an if Statement?

Can You Employ Multiple OR Conditions in an if Statement? [Duplicate]

Within an if statement, using multiple OR conditions can be a useful technique for evaluating multiple conditions simultaneously. However, the syntax for expressing these conditions can be confusing.

In the code snippet below, the intention is to evaluate whether the user's input number is equal to 1, 2, or 3:

if (number==1||2||3) {
    cout << "Your number was 1, 2, or 3." << endl;
}

However, this code doesn't work as expected. The problem lies in the syntax: the way the conditions are written, the compiler interprets it as:

if ( (number == 1) || 2 || 3 ) {

In this interpretation, the logical OR operator (||) evaluates to true if either the left side is true or the right side is true. Since both 2 and 3 are true values, the entire condition evaluates to true regardless of the value of number.

To correctly express multiple OR conditions, each condition must be explicitly evaluated against the variable:

if (number==1 || number==2 || number==3) {
    cout << "Your number was 1, 2, or 3." << endl;
}

With this syntax, the condition will evaluate correctly, returning true only if number is equal to 1, 2, or 3.

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