Pyviel

PyvielbetaWeb
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Quick help

  

    
Say something
print("Hello!")
# a comment
print shows something. Words in quotes are text. A line that begins with # is a note for people; Python skips it.

    
Keep a value
score = 0
score = score + 1
print(score)
A name, an = and a value keep it for later. The new value replaces the old one.

    
Make a choice
if score > 10:
    print("You made it.")
else:
    print("Keep going.")
The line ends with : and the lines below are pushed in by four spaces. They belong to it.

    
Do it again
for i in range(3):
    print("Again!")

n = 0
while n < 3:
    n = n + 1
for repeats a number of times. while keeps going while the question is true.

    
Ask a question
name = input("Your name? ")
age = int(input("Your age? "))
print("Hi", name)
input asks and gives back text. int(...) turns the text into a whole number.

    
Your own function
def greet(name):
    return "Hello " + name

print(greet("Ada"))
A function is a few lines with a name. return gives back the result.

    
A list
pets = ["cat", "dog"]
print(pets[0])
pets.append("owl")
print(len(pets))
The first item is number 0. append adds one at the end. len counts.

    
When something breaks
print(pirnt)
Pyviel says in a short sentence what happened and on which line. View full error shows the whole Python message.

  

  
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