“Remove all the lines that contain the character ‘a’ in a file and write them to another file” is a classic Class 12 computer science file-handling practical. The program reads a text file line by line, throws away every line that contains the letter a, and saves the remaining lines in a new file. In

“Read a text file and display the number of vowels, consonants, uppercase and lowercase characters in the file” is a standard file-handling practical in Class 12 computer science. The program opens a text file, reads its text, visits every character and keeps four counters. In this post you will see the program in Python, C

“Read a text file line by line and display each word separated by a #” is a popular file-handling practical in Class 12 computer science. The program opens a text file, reads one line at a time, splits each line into words and prints every word followed by a #. In this post you will

“Input three numbers and display the largest and the smallest number” is one of the first decision-making programs in Class 11 and 12 computer science. It teaches you how a program compares values with if statements and how to keep the best answer found so far in a variable. In this post you will see

“Input two numbers and display the larger and the smaller number” is usually the very first if statement a student writes. It teaches how a program compares two values and chooses what to do next. In this post you will see the program in Python, C and Java, a dry run, six other ways to

“Input a welcome message and display it” is usually the first program that takes data from the user. It teaches the two most basic actions in every program, taking input and giving output, and it introduces your first variable. In this post you will see the program in Python, C and Java, a step-by-step explanation,

CBSE Class 10 Mathematics (Standard) Board Compartment Examination Question Paper 2026 Code 30-8-1 with Solutions CBSE Class 10 Mathematics (Standard) Board Compartment Examination Question Paper 2026 Code 30-8-1 with Solutions Time: 3 Hours · Max Marks: 80 · Tap an option for instant feedback · Tap “Show Answer” for full solutions Score: 0 / 20Attempted:

“Create a dictionary with the roll number, name and marks of n students in a class and display the names of students who have marks above 75” is a standard Python practical for Class 11 and 12 computer science. It combines three important ideas: a dictionary with a key and a value, a loop that

CBSE Class 10 Mathematics (Standard) Board Compartment Examination Question Paper 2026 with Solutions Code 30-7-1 CBSE Class 10 Mathematics (Standard) Board Compartment Examination Question Paper 2026 Code 30-7-1 with Solutions Time: 3 Hours · Max Marks: 80 · Tap an option for instant feedback · Tap “Show Answer” for full solutions Score: 0 / 20Attempted:

Searching for an element in a list or tuple is one of the first algorithms every programmer learns. You are given a collection of values and a key, and the program must say whether the key is present and, if it is, where. The same idea powers contact search, spell checkers and databases. In this

“Input a list of numbers and swap the elements at the even locations with the elements at the odd locations” is a favourite practical question in school computer science. The idea is simple: the first element swaps with the second, the third with the fourth, and so on. The program teaches you three important things

Finding the largest and the smallest number in a list or tuple is one of the most common beginner programs. It teaches you how to scan a collection, keep a “record” in a variable, and update it with an if statement. The same idea is used behind every maximum, minimum, high score and lowest price

Two string programs come up again and again in school practicals and exams: checking whether a string is a palindrome, and converting the case of its characters. Both are small programs, but together they teach you how to walk through a string, compare characters, and use ASCII codes. In this guide you will learn how

Finding the GCD (greatest common divisor) and LCM (least common multiple) of two numbers is a classic question in school practicals, board exams and coding interviews. It is also useful in real life, for example when you reduce a fraction or add fractions with different denominators. In this guide you will learn how to write

The Fibonacci series program is one of the first programs every student writes after learning loops. You are asked to display the terms of the series: 0, 1, 1, 2, 3, 5, 8, 13 and so on. It looks small, but it teaches variables, loops, swapping values and even recursion. In this guide you will