Course Content
Conditional Statements in Python
3. Python if-elif-else Statement
4. Python Ternary Operator
Conditional Statements in Python
Introduction to if-else Statement
Let's look at some examples first.
Example 1:
Checking a number for negativity.
Example 2:
Checking whether a chocolate bar is expensive or has an average price.
We can observe that to address various situations, it's necessary to write if-statements multiple times.
However, to adhere to the DRY ("Don't Repeat Yourself", one of the principles of good code) principle and maintain conciseness, we can make use of the else keyword.
Let's rewrite the example above and simplify them.
Example 3:
Example 4:
For a clearer understanding of the if-else expression's functionality, refer to the diagram below.
Time to consolidate your knowledge.
Task
Let's write a program that takes 3 numbers as input, these will be the sides of a triangle, and our program will check and say whether it is really possible to build a triangle from these three segments, or not.
Recall the conditions that the segments must satisfy in order to be able to construct a triangle :either side of an arbitrary triangle is less than the sum of its other two sides. x + y > z and x + z > y and y + z > x.
Everything was clear?
Course Content
Conditional Statements in Python
3. Python if-elif-else Statement
4. Python Ternary Operator
Conditional Statements in Python
Introduction to if-else Statement
Let's look at some examples first.
Example 1:
Checking a number for negativity.
Example 2:
Checking whether a chocolate bar is expensive or has an average price.
We can observe that to address various situations, it's necessary to write if-statements multiple times.
However, to adhere to the DRY ("Don't Repeat Yourself", one of the principles of good code) principle and maintain conciseness, we can make use of the else keyword.
Let's rewrite the example above and simplify them.
Example 3:
Example 4:
For a clearer understanding of the if-else expression's functionality, refer to the diagram below.
Time to consolidate your knowledge.
Task
Let's write a program that takes 3 numbers as input, these will be the sides of a triangle, and our program will check and say whether it is really possible to build a triangle from these three segments, or not.
Recall the conditions that the segments must satisfy in order to be able to construct a triangle :either side of an arbitrary triangle is less than the sum of its other two sides. x + y > z and x + z > y and y + z > x.
Everything was clear?
