Flowchart gallery

See which flowchart each code produces — loops, recursion, lambdas and more. Open any one fullscreen or edit it in the editor.

160 examples

Branching · if / elif / else

Python

Branching · if / else

C++

Branching · if / else

C#

Sign of a number

Branching · if / else if / else

Java

Ternary operator

Branching · ?: → branching

C++

Branching · compound condition

Python

Switch / case · switch + default

C++

Switch / case · structural pattern matching

Python

Switch / case · switch over ranges

Java

Switch / case · case in Pascal

Pascal

switch-expression

Switch / case · C# switch

C#

Loops · for + range

Python

Factorial (loop)

Loops · for with accumulation

C++

Loops · for over an array

C

Reverse a number

Loops · while

C++

Loops · post-condition loop

C++

repeat .. until

Loops · post-condition in Pascal

Pascal

Loops · foreach over a collection

C#

Loops · for (T x : c)

Java

Loops · descending for

Pascal

Factorial (recursion)

Recursion · self-call → subroutine

Python

Fibonacci numbers

Recursion · double recursion

Python

Recursion · recursive power

C++

Recursion · recursion over digits

Java

Lambdas · name = lambda → separate diagram

Python

Lambdas · lambda + ternary

Python

Lambdas · auto f = [](){…}

C++

Input/Output · input → print

Python

Input/Output · cin / cout

C++

Input/Output · readln / writeln

Pascal

Input/Output · Console.ReadLine / WriteLine

C#

Exceptions · try / except

Python

Exceptions · try / catch

Java

Classes & methods · class method

Java

Reverse a string

Classes & methods · static method

C#

Classes & methods · class method

C++

Algorithms · nested loops + swap

Python

Algorithms · loop + return index

Java

Algorithms · loop with early return

C++

Algorithms · while + branching

Python

Algorithms · loop + multiple conditions

Python

Algorithms · while + I/O

Pascal

Algorithms · while accumulation

C#

Algorithms · insertion sort

C++

Algorithms · selection sort

Java

Sieve of Eratosthenes

Algorithms · primes up to n

C++

Algorithms · string palindrome

Python

Reverse a string

Algorithms · reverse a string

C#

Loops · how many vowels

Python

Towers of Hanoi

Recursion · classic recursion

Python

Algorithms · least common multiple

C

Algorithms · decimal → binary

C++

Max in an array

Loops · largest element

C

Loops · evens up to n

Pascal

Loops · how many digits

Pascal

Category by age

Branching · if / else

JavaScript

Sign of a number

Branching · if / else if + types

TypeScript

Branching · if / elseif / else

PHP

Branching · if / else if / else

Go

Switch / case · switch + default

TypeScript

Switch / case · switch + default

Go

Switch / case · match expression

PHP

Switch / case · switch + default

JavaScript

Switch / case · switch + default

PHP

Loops · for-of

JavaScript

Loops · for + range

Go

Loops · foreach

PHP

Reverse a number

Loops · while

JavaScript

Factorial (loop)

Loops · for with accumulation

JavaScript

Loops · for + types

TypeScript

Reverse a number

Loops · while

TypeScript

Reverse a number

Loops · for (while form)

Go

Factorial (recursion)

Recursion · recursion

TypeScript

Fibonacci numbers

Recursion · double recursion

Go

Recursion · recursive power

JavaScript

Recursion · recursion over digits

PHP

Lambdas · name = arrow → separate diagram

JavaScript

Lambdas · arrow + types

TypeScript

Lambdas · closure assigned to name

PHP

Input/Output · prompt → console.log

JavaScript

Input/Output · prompt → console.log

TypeScript

Input/Output · fmt.Scan / Println

Go

Input/Output · readline → echo

PHP

Exceptions · try / catch

JavaScript

Exceptions · try / catch

TypeScript

Exceptions · returning an error

Go

Exceptions · try / catch

PHP

Classes & methods · class method

TypeScript

Classes & methods · class method

PHP

Classes & methods · class method

JavaScript

Classes & methods · method with receiver

Go

Account deposit

Classes & methods · method with receiver

Go

Algorithms · loop + return index

JavaScript

Algorithms · loop with early return

Go

Algorithms · nested loops + swap

JavaScript

Algorithms · loop with early return

TypeScript

Algorithms · while + branching

TypeScript

Algorithms · while + swap

Go

Algorithms · while loop

PHP

Algorithms · loop + return index

PHP

Quadratic equation

Branching · discriminant, if / else

Pascal

Multiplication table

Loops · nested for loops

Pascal

Armstrong number

Loops · sum of digit cubes

Python

Loops · sum of divisors

C++

Prime factorization

Algorithms · division loop

Python

Bisection method

Algorithms · numeric method, while

C++

Pi (Leibniz series)

Loops · alternating series

C

Loops · sum / count

Java

Algorithms · find smallest

Go

Matrix transpose

Loops · nested loops, swap

C++

Main diagonal sum

Loops · loop over diagonal

Java

Swap two variables

Input/Output · via temp variable

Pascal

Recursion · divide and conquer

C++

Newton's method

Algorithms · loop + update

C++

Trapezoidal rule

Algorithms · numeric integration

Pascal

Algorithms · numeric integration

Java

Taylor series for e^x

Algorithms · series accumulation

C#

Taylor series for sin

Algorithms · alternating series

Python

Horner's scheme

Algorithms · polynomial evaluation

C++

Matrix multiplication

Loops · nested loops

Java

Symmetric matrix check

Loops · nested loops

C++

Maximum in a matrix

Loops · nested loops

Pascal

Row sums of a matrix

Loops · nested loops

C#

Anti-diagonal sum

Loops · loop over diagonal

Go

Loops · loop over characters

TypeScript

Substring search

Algorithms · nested loops

C++

Character frequency

Loops · counting in an array

Java

Algorithms · character counting

C#

Algorithms · character shift

Pascal

Count uppercase letters

Loops · loop + condition

JavaScript

Loops · loop + condition

PHP

Collatz conjecture

Loops · while + branching

Python

Loops · nested loops

C++

Amicable numbers

Algorithms · sum of divisors

Java

Triangular number

Loops · sum accumulation

Pascal

Sum of proper divisors

Loops · loop + condition

C#

Loops · loop + counter

Go

Palindrome number

Algorithms · reversing a number

C++

Fast exponentiation

Algorithms · binary exponentiation

Java

Algorithms · loop + array

C++

Solving a linear equation

Branching · if / else if / else

Pascal

Quadratic discriminant

Branching · if / else if / else

C#

Power (recursion)

Recursion · recursion

C++

Sum 1..n (recursion)

Recursion · recursion

Java

GCD (recursion)

Recursion · Euclid recursion

Python

String reverse (recursion)

Recursion · recursion

TypeScript

Recursion · recursion over digits

Pascal

Ackermann function

Recursion · double recursion

C++

Celsius to Fahrenheit

Input/Output · formula + output

Python

Simple interest

Input/Output · formula + output

Pascal

Compound interest

Loops · loop over years

Java

Minimum of three

Branching · sequential ifs

C

Sort three numbers

Branching · swap via if

C

Triangle area (Heron)

Input/Output · Heron's formula

C#

Rectangle perimeter and area

Input/Output · two formulas

PHP

Array-based stack

Classes & methods · push / pop

Java

Array-based queue

Classes & methods · enqueue / dequeue

C++

Count occurrences

Loops · loop + counter

TypeScript

Remove duplicates

Algorithms · nested loops

Python

Second largest element

Algorithms · two maxima

Go