Summary - Conditionals
- Python course
- Beginner
- Lesson 41/116
- 5 min
Combine if, elif and conditional expressions to write a day-of-week app.
Summary - Conditionals
In this group you learned if, elif/else, nested if, truthiness and conditional expressions.
- if: runs a block when the condition is true.
- elif/else: extra conditions and fallback.
- Prefer and over nested if.
- Truthy/falsy: check empty with if name.
- Conditional expression: one-line if/else.
Now two tasks combine these concepts.
Practice if/elif/else chain
Assign score = 85. Write if score >= 90: print("A"), elif score >= 80: print("B"), else: print("C").
Starter code
# if/elif/else chainSample solution
score = 85
if score >= 90:
print("A")
elif score >= 80:
print("B")
else:
print("C")Expected output
B
Practice Empty check with truthiness
Assign name = "". Write if not name: print("Empty").
Starter code
# Empty checkSample solution
name = ""
if not name:
print("Empty")Expected output
Empty
Questions and answers
Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.
1 Which is wrong?
- if checks a condition
- elif adds a condition
- and combines two conditions
- else takes a condition Correct answer
Explanation: else takes no condition, it is just a fallback block.
2 Complete the conditional expression
Question
result = "Passed" if score >= 50 ____ "Failed"
Answer
result = "Passed" if score >= 50 else "Failed"Explanation: else gives the value when the condition is false.