len

int  len(<vector>v)

int  len(<matrix>m)

int  len(<type>array[])

int  len(string s)

int  len(dict d)

Returns the number of items/components in the given object. For an array, this is the number of items in the array. For a matrix or vector, this is the number of components.

For a string, this returns the number of bytes (not characters).

For a dictionary, this returns the number of keys in the dictionary.

Don’t confuse this function with length, which returns the magnitude of a vector.

Examples

examples

len("hello") == 5;
len({ {1,0,0}, {0,1,0}, {0,0,1} }) == 9;
len({0, 10, 20, 30}) == 4;