{"id":22,"date":"2025-10-19T02:52:16","date_gmt":"2025-10-19T02:52:16","guid":{"rendered":"https:\/\/codetypingpro.com\/?p=22"},"modified":"2025-12-17T11:02:50","modified_gmt":"2025-12-17T11:02:50","slug":"lesson-4-input-output-and-type-casting","status":"publish","type":"post","link":"https:\/\/codetypingpro.com\/?p=22","title":{"rendered":"Lesson 4: Input, Output, and Type Casting"},"content":{"rendered":"\n

\ud83c\udfaf Lesson Objective<\/strong><\/h3>\n\n\n\n

To understand how to take user input, display output, and convert data types in Python programs.<\/p>\n\n\n\n

\n\n\n\n

\ud83e\udde0 1. Input in Python<\/strong><\/h3>\n\n\n\n

The input()<\/code> function allows users to enter data from the keyboard.
By default, it returns data as a string<\/strong>.<\/p>\n\n\n\n

Example:<\/p>\n\n\n\n

name = input(\"Enter your name: \")\nprint(\"Hello,\", name)\n<\/code><\/pre>\n\n\n\n
\ud83d\udd39 Example 2: Taking numeric input<\/strong><\/p>\n\n\n\n
num = input(\"Enter a number: \")\nprint(num + 10)  # \u274c Error (string + int not allowed)\n<\/code><\/pre>\n\n\n\n
To fix this, convert input to an integer:<\/p>\n\n\n\n
num = int(input(\"Enter a number: \"))\nprint(num + 10)  # \u2705 Works correctly\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\ud83d\udcac 2. Output in Python<\/strong><\/h3>\n\n\n\n
Use the print()<\/code> function to display information.<\/p>\n\n\n\n
Example:<\/p>\n\n\n\n
name = \"Ali\"\nage = 25\nprint(\"My name is\", name, \"and I am\", age, \"years old.\")\n<\/code><\/pre>\n\n\n\n
\ud83d\udd39 Formatting Output<\/strong>
You can format text neatly using f-strings<\/strong>:<\/p>\n\n\n\n
name = \"Sara\"\nage = 21\nprint(f\"My name is {name} and I am {age} years old.\")\n<\/code><\/pre>\n\n\n\n
Another method: format()<\/code><\/p>\n\n\n\n
print(\"My name is {} and I am {} years old.\".format(name, age))\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\ud83d\udd04 3. Type Casting<\/strong><\/h3>\n\n\n\n
Type casting<\/strong> means converting one data type to another.<\/p>\n\n\n\n
Common conversion functions:<\/p>\n\n\n\n
Function<\/th>Description<\/th>Example<\/th>Output<\/th><\/tr><\/thead>
int()<\/code><\/td>Converts to integer<\/td>int(\"10\")<\/code><\/td>10<\/td><\/tr>
float()<\/code><\/td>Converts to float<\/td>float(\"3.14\")<\/code><\/td>3.14<\/td><\/tr>
str()<\/code><\/td>Converts to string<\/td>str(25)<\/code><\/td>“25”<\/td><\/tr>
bool()<\/code><\/td>Converts to boolean<\/td>bool(0)<\/code><\/td>False<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Example:<\/p>\n\n\n\n
x = \"100\"\nprint(int(x) + 50)   # 150\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\ud83d\udd0d 4. Combining Input, Output & Type Casting<\/strong><\/h3>\n\n\n\n
Example Program:<\/p>\n\n\n\n
name = input(\"Enter your name: \")\nage = int(input(\"Enter your age: \"))\nprint(f\"Welcome {name}! Next year you will be {age + 1} years old.\")\n<\/code><\/pre>\n\n\n\n
Output:<\/p>\n\n\n\n
Enter your name: Ahmed\nEnter your age: 20\nWelcome Ahmed! Next year you will be 21 years old.\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\ud83e\udde9 5. Real-Life Example<\/strong><\/h3>\n\n\n\n
Suppose you are building a billing program<\/strong>:<\/p>\n\n\n\n
item = input(\"Enter item name: \")\nprice = float(input(\"Enter item price: \"))\nquantity = int(input(\"Enter quantity: \"))\ntotal = price * quantity\nprint(f\"Total cost for {item} = \u20b9{total}\")\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\ud83e\udde0 6. Practice Ideas<\/strong><\/h3>\n\n\n\n
Take age as input and display how old the person will be after 10 years.<\/p>\n\n\n\n
Write a program to input two numbers and display their sum, difference, and product.<\/p>\n\n\n\n
Create a greeting program that asks for the user\u2019s name and city, then prints a personalized message.<\/p>\n\n\n\n
Convert a string \"123.45\"<\/code> to a float and print its type.<\/p>\n\n\n\n
Lesson_4_Input_Output_and_Type_Casting_Practice_Sheet<\/a>Download<\/a><\/div>\n\n\n\n
more examples<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\ud83c\udfaf Lesson Objective To understand how to take user input, display output, and convert data types in Python programs. \ud83e\udde0 1. Input in Python The input() function allows users to enter data from the keyboard.By default, it returns data as a string. Example: \ud83d\udd39 Example 2: Taking numeric input To fix this, convert input to […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,1],"tags":[],"class_list":["post-22","post","type-post","status-publish","format-standard","hentry","category-python-easy-course-outline","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/codetypingpro.com\/index.php?rest_route=\/wp\/v2\/posts\/22","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/codetypingpro.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/codetypingpro.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/codetypingpro.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/codetypingpro.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=22"}],"version-history":[{"count":3,"href":"https:\/\/codetypingpro.com\/index.php?rest_route=\/wp\/v2\/posts\/22\/revisions"}],"predecessor-version":[{"id":333,"href":"https:\/\/codetypingpro.com\/index.php?rest_route=\/wp\/v2\/posts\/22\/revisions\/333"}],"wp:attachment":[{"href":"https:\/\/codetypingpro.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=22"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/codetypingpro.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=22"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/codetypingpro.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=22"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}