Guidelines

How many nested for loops is too many?

How many nested for loops is too many?

There are no limits. Or, more precisely, there are no maximum limits on the user. There are minimum limits on the compiler, however. So you can have 127 nested loops/if/switch and 12-dimensional arrays and be sure that any compliant compiler will be able to compile you.

Is nesting limited to for loops?

The upper limit for nested loops in C is three. Yes, you can nest forever, but then you have a very difficult program to debug. Keep your nested loop structures to a maximum of three levels. If you need more levels, consider writing a separate function that you can call to execute the code.

What is the maximum number of loops in a loop?

There can be maximum of 9 loops within a loop.

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Are nested for loops always bad?

Nested loops are frequently (but not always) bad practice, because they’re frequently (but not always) overkill for what you’re trying to do. In many cases, there’s a much faster and less wasteful way to accomplish the goal you’re trying to achieve.

Is nesting for loops bad?

How many levels of nesting is possible in for?

The C language allows for up to 127 levels of nested blocks; like 640KB of RAM, that’s all anyone should ever need. In practice, if you find yourself nesting more than 4 or 5 levels deep, think about factoring some of those inner levels out to their own functions (or re-think your algorithm).

Why nested code is bad?

Deeply nested conditionals make it just about impossible to tell what code will run, or when. The big problem with nested conditionals is that they muddy up code’s control flow: in other words, they make it just about impossible to tell what code will run, or when.

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Are triple nested loops bad?

There’s nothing inherently wrong or necessarily even bad about nested loops.

Are for loops inefficient?

1* loops in this category always generate results in almost all iterations. They are inefficient because their results are useless due to high-level semantic reasons.