Data type - dtype in NumPy is different from the primitive data types in Python, for example, dtype has the type with higher resolution that is useful in the data calculation. NumPy Data Type Data Type Description bool Boolean int8 8-bit signed integer int16 16-bit signed integer int32 32-bit signed integer int64 64-bit signed integer uint8 8-bit unsigned integer uint16 16-bit unsigned integer uint32 32-bit unsigned integer uint64 64-bit unsigned integer float16 16-bit floating point number float32 32-bit floating point number float64 64-bit floating point number complex64 64-bit complex number complex128 128-bit complex number When creating a new ndarray data, you can define the data type of the element by string or or data type constants in the NumPy library.