The function use to get the number of element in a dictionary is len.
<h3>What is a dictionary?</h3>
Dictionaries are used to store data values in key-value pairs. Dictionary are ordered.
Dictionary in python are express as follows:
my_dict = {"name": "Michael", "age": 28, "school": "Oxford"}
Therefore, the length of the element of the dictionary can be gotten using the len() function.
Hence,
print(len(my_dict)) will give you the length of the element.
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Answer:
Following are the description to the given points:
Explanation:
To resolve basic design restrictions, EBNF has also been developed.This principle was its lack of support can identify repeatings easily. It implies that popular BNF models, like the description of a sequence of replicable elements, are complicated and rely on contra intuitive logical math.
To set a list of words divided by commas (e.g. john, coffee, logic) for instance, we would like to say something like "a list is a word accompanied by a few commas or terms." Through EBNF, they may say so. However, there have been no "many" alternatives in the standard BNF format. So, to describe something such as "a list is a term or a number accompanied by a pair with notation and script," you have to say the same thing. Which functions, although it is difficult, as it specifies a variety of lists instead of a specific list.
Essentially, "john, coffee, logic is John's list, accompanied by coffees or, and logic" would be the earlier link. That's why in Option (a):
The return statement in Java is:
return ('”‘ (~[“] | ” [”e‘])*);
In option (c), it is the valid statement.
Answer:
The C's malloc and free functions and the C++'s new and delete operators execute similar operations but in different ways and return results.
Explanation:
- The new and delete operators return a fully typed pointer while the malloc and free functions return a void pointer.
-The new and delete operators do not return a null value on failure but the malloc/free functions do.
- The new/delete operator memory is allocated from free store while the malloc/free functions allocate from heap.
- The new/delete operators can add a new memory allocator to help with low memory but the malloc/free functions can't.
- The compiler calculates the size of the new/delete operator array while the malloc/free functions manually calculate array size as specified.
