What's the difference between [:5] and [5] in this Python code?

Question

What's the difference between [:5] and [5] in this Python code?

y_test_predicted = model.predict(X_test)

residuals = Y_test   -   y_test_predicted

print(residuals[:5])

print(residuals[5])

Answer 1

you can find a useful information about slicing in this link .

Refer to below simple example to understand it as a glimpse:

list = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'i', 'j']
print(list[5]) #it will print: f
print(list[:5]) #it will print:  ['a', 'b', 'c', 'd', 'e'], indices form 0 to 4
#List Slicing: list[start:stop:step]