Array length Calculation

In the C language, there is the sizeof () keyword . Can be used to calculate the size of an array (the number of bytes in the array), but not the length .

However, it can be divided by the number of bytes of an array of individual elements to calculate the length:

A[7] = {1,2,3,4,5,,6,7};

length = sizeof (a)/sizeof (a[0]);

The above method can be used in C + +, but you can also:

A[7] = {1,2,3,4,5,6,7}

int *abeg = Beg (a);

int *aend = end (a);

Auto dis = Aend-abeg;

cout<<dis<<endl;

In C + +, it is recommended to use vector containers instead of arrays, whose lengths can be calculated directly using Name.size ().

Calculate the size of the array in Java:

public class Testjava {
public static void Main (string[] args) {
int a[] = {1,2,3,4,5};
System.out.println (a.length);
}
}

Calculate the size of the array in Python:

A = [1,2,3,4,5]

Print (Len (a))

Very simple things, but too long did not write code after unexpectedly still forget. It's really going to take more practice.

Array length calculation