Python Dictionaries and Control Flow

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Questions and Answers

Know the syntax of retrieving a value from a dictionary by specifying its key.

my_dictionary['key']

Predict the outcome of the program which uses an if statement to check whether the key exists in the dictionary by using the in operator

The program will print True if the key is found in the dictionary and False otherwise.

Know the function of the BREAK statement

The BREAK statement terminates the current loop immediately, skipping any remaining iterations.

Know the syntax of retrieving a key from a dictionary

my_dictionary.keys() Signup and view all the answers

Predict the outcome of the program which uses COUNT in the for loop containing an If statement

The program will count the number of times the condition in the If statement evaluates to True within the for loop. Signup and view all the answers

Know the definition of the Python dictionary

A dictionary is a mutable data structure that stores elements as key-value pairs. Signup and view all the answers

Predict the outcome of the program which uses del and len functions

The program will delete a specific key-value pair from the dictionary using 'del' and subsequently determine and display the number of remaining key-value pairs using 'len'. Signup and view all the answers

Predict the outcome of the program which uses break functions

The program will exit the loop prematurely when the break function is encountered, ending the loop's execution. Signup and view all the answers

Predict the outcome of the program which uses continue functions and "num % 2 == 0" expression

The program will iterate through the loop, but it will skip the current iteration if the value of 'num' is even (divisible by 2). Signup and view all the answers

Write a line of code assign a value of a key of the dictionary to a variable

my_variable = my_dictionary['key'] Signup and view all the answers

Know the function of the len function

The len function determines the number of elements in a sequence, such as a list, string, or dictionary. Signup and view all the answers

Predict the outcome of the program which uses pass function in the loop containing an If statement

The program will execute the loop, but the pass statement will have no effect on the execution flow. Signup and view all the answers

Know the function of the continue function

It skips the remaining code in the current iteration of the loop, jumping to the next iteration. Signup and view all the answers

Being able to name loop control statements

The loop control statements are break, continue and pass. Signup and view all the answers

Predict the outcome of the program which uses break function in the for loop containing an If statement and "num % 2 == 0" expression

The loop will terminate early (break) when the value of 'num' is even. The program will not execute all iterations. Signup and view all the answers

Know the correct syntax to declare a dictionary

my_dictionary = {'key1': 'value1', 'key2': 'value2', 'key3': 'value3'} Signup and view all the answers

Predict the outcome of the program which uses continue function in the for loop containing an If statement

The program will continue executing the loop, skipping any remaining code in the current iteration if the condition within the If statement is True. Signup and view all the answers

Predict the outcome of the program containing a dictionary which uses len function together with a print function

The program will print the number of key-value pairs present in the dictionary. Signup and view all the answers

Predict the outcome of the program which uses pass function with "num % 2 == 0" and "num % 3 == 0" expressions

The program will execute the loop, but the pass statement will have no effect on the execution flow. Signup and view all the answers

Know the syntax of retrieving a key from a dictionary using a for loop

for key in my_dictionary: Signup and view all the answers

Predict the outcome of the program which uses continue function in the for loop containing an If statement with "num % 2 == 0" expression and a range function (containing 2 parameters)

The program will continue executing the loop, skipping any remaining code in the current iteration if the value of 'num' is even. Signup and view all the answers

Know the correct syntax to enclose the entire Python dictionary declaration

my_dictionary = {'key1': 'value1', 'key2': 'value2', 'key3': 'value3'} Signup and view all the answers

Know the correct syntax to print all the keys in the Dictionary.

for key in my_dictionary: Signup and view all the answers

Predict the outcome of the program which uses pass function in the for loop containing an If statement and "num % 3 == 0" expressions

The program will execute the for loop, but the pass statement will have no effect on the execution flow. Signup and view all the answers

Study Notes