Number programs · Python Programs
These classic number programs teach loops, conditions and functions through small problems with a known answer. Every page has the problem statement, a clear solution, the output, an explanation step by step and variations to try.
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Python Program to Check Even or Odd Number
To check if a number is even or odd in Python, test `number % 2 == 0`: a remainder of 0 means the number is even, anything else m…
Python Program to Check Prime NumberA prime number is a whole number greater than 1 that has no divisors other than 1 and itself; in Python you test it by trying div…
Python Program to Find Factorial of a NumberThe factorial of n (written n!) is the product of all whole numbers from 1 to n, and in Python you can compute it with a loop, wi…
Python Program to Print the Fibonacci SeriesThe Fibonacci series starts with 0 and 1, and every next term is the sum of the previous two; in Python the simplest way to print…
Python Program to Check Armstrong NumberAn Armstrong number equals the sum of its digits each raised to the power of the number of digits; for example `153 = 1^3 + 5^3 +…
Python Program to Find GCD of Two NumbersThe GCD (greatest common divisor, also called HCF) of two numbers is the largest number that divides both exactly; in Python use …
Python Program to Check Leap YearA year is a leap year if it is divisible by 4, except century years, which must also be divisible by 400; in Python that is `year…
Python Program to Find the Sum of Digits of a NumberTo find the sum of the digits of a number in Python, either convert it to a string and add each digit with `sum(int(d) for d in s…
Python Program to Print a Multiplication TableTo print a multiplication table in Python, loop `i` from 1 to 10 with `range(1, 11)` and print `n * i` for each step, for example…
Python FizzBuzz ProgramFizzBuzz asks you to print the numbers 1 to 100, replacing multiples of 3 with `Fizz`, multiples of 5 with `Buzz` and multiples o…
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