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#### if_else_ Statement

    #include <boost/phoenix/statement/if.hpp>

The syntax is

    if_(conditional_expression)
    [
        sequenced_statements
    ]
    .else_
    [
        sequenced_statements
    ]

Take note that `else` has a leading dot and a trailing underscore: `.else_`

Example: This code prints out all the elements and appends `" > 5"`, `" == 5"` or `" < 5"` depending on the element's actual value:

    std::for_each(c.begin(), c.end(),
        if_(arg1 > 5)
        [
            cout << arg1 << " > 5\n"
        ]
        .else_
        [
            if_(arg1 == 5)
            [
                cout << arg1 << " == 5\n"
            ]
            .else_
            [
                cout << arg1 << " < 5\n"
            ]
        ]
    );

Notice how the `if_else_` statement is nested.