Branching Part 1

Question 1

The if statement (2)

What it evaluates and the two paths

Answer 1

-If condition is evaluated to True, the code inside the body of if is executed.
- If condition is evaluated to False, the code inside the body of if is skipped.

Question 2

The if…else statement (3)

the two consitions/paths+ when we use it

Answer 2

**If the condition evaluates to True,
**the code inside if is executed the code inside else is skipped

**If the condition evaluates to False,
the code inside else is executed
the code inside if is skipped*

used to execute a block of code among two alternatives.

Question 3

if…elif…else (5)

The paths and when do we use it?

Answer 3

If condition1 evaluates to true, code block 1 is executed.
If condition1 evaluates to false, then condition2 is evaluated.
If condition2 is true, code block 2 is executed.
If condition2 is false, code block 3 is executed.

if we need to make a choice between more than two alternatives, then we use the if…elif…else statement.

Question 4

Write a program that caculates the area of a triangle

Answer 4

length = int(input(“Enter the length: “))
width = int(input(“Enter the width: “))
area = length * width
print(“Area: “, area)

Question 5

When is branching used?

Answer 5

When alternative courses of action are possible and each action may produce a different result

Question 6

Boolean expressions

Answer 6

Memory location that only stores a true or false value

Question 7

Branches are

+eg

Answer 7

questions with answers that are either true or false
eg. Is it true that the variable num is positive?

Question 8

Branching structure for ‘if’ cases

its reactions

Answer 8

Reacts differently only for true cases

Question 9

Branching structure for “if-else” cases

its reaction

Answer 9

reacts differently for the true or false cases

Question 10

Branching structure for “if-elif-else” cases

Answer 10

Multiple cases possible but only one case can apply, if one case is true then its false that the other cases apply.

Question 11

body of a branch (2)

what it is+ formatting

Answer 11

• a block of prgram instructions that will execute when a Boolean expression evaluates to/works out to true
• Specified with indenting in python

Question 12

If you dont follow style convention then it is

Answer 12

a syntax error

Question 13

Operator/ Operation

Answer 13

Action being performed
*The sign (ex: +)

Question 14

Operand

Answer 14

The item or items on which the operation is being performed
The number it is operating on

Question 15

Why is indenting manadartory in python?

Answer 15

To determine which statements are part of a body

Question 16

How is a body with multiple instructions shown?

Answer 16

All the statements have to be indented
Indent everything that executes

Question 17

You should not use _____ for indenting

Answer 17

tabs

Question 18

When comparing operands, make sure they are

ex

Answer 18

the same tupe or at least comparable. Ex integer and float comparision is okay, Integer and string is not

Question 19

write me a short program with branching that error checks

Answer 19

Question 20

Difference between If and If-Else case

Answer 20

Unlike If, If-Else also reacts if the condition is not true (false) executing the body of the false statement which is not present in if statements.

Question 21

logical AND

Answer 21

applies when call conditions must be met (Everything is true)

Question 22

Logical OR

Answer 22

At least one condition must be met. If at least one is true, the result is true.

Question 23

Logical NOT

Answer 23

The everyday usage of logical NOT negates a statement

Question 24

Order of operation for complex logical expressions

Answer 24

1. Brackets (inner first)
2. Negation
3. AND
4. OR