Become an AI engineer by building.

Why start here

Every AI system you will build later in this track is, underneath, an ordinary Python program: it reads some data, makes decisions, repeats steps and returns a result. If you are comfortable with the ideas in this module, everything after it is about what to build, not about fighting the language.

No setup is needed. The lab at the end runs Python right in your browser.

Values and variables

A variable is a name for a value:

name = "Asha"        # a string (text) — always in quotes
marks = 82           # an integer (whole number)
attendance = 0.93    # a float (decimal number)
is_topper = True     # a boolean: True or False

You can change a variable at any time, and combine values:

marks = marks + 5            # now 87
greeting = "Hello, " + name  # "Hello, Asha"
print(greeting)

print(...) shows a value on the screen. It is the simplest way to see what your program is doing.

Lists: many values in order

A list holds several values in order, inside square brackets:

scores = [82, 67, 91, 45]

scores[0]          # 82  — positions start at 0
scores[-1]         # 45  — negative positions count from the end
len(scores)        # 4
scores.append(73)  # add to the end
sum(scores)        # 358