The ultimate recursion guide! Master basics, solve real-world problems, and get interview-ready in hours with FAANG engineers’ proven strategies.

If you’ve ever struggled with solving coding problems using recursion, or if you need to brush up your recursion skills for an interview, this course is for you! We will start with the basics of recursion before we practice solving actual coding problems. You’ll have access to detailed explanations and visualizations for each problem to help you along the way.

By the time you have completed this course, you’ll be able to use all the concepts of recursion to solve complex, real-world problems. We hope that this course will help you ace all the recursion related questions during interviews at top tech companies!

Recursion for Coding Interviews in Python

def decimalToBinary(testVariable) :
  # Base Case
  if testVariable <= 1:
    return str(testVariable)

  # Recursive Case
  else:
    return decimalToBinary(testVariable // 2) + decimalToBinary(testVariable % 2) # Floor division - 
      # division that results into whole number adjusted to the left in the number line

# Driver Code
testVariable = 11
print(decimalToBinary(testVariable))

## Explanation:

To convert a decimal number to a binary number, keep track of the $remainder$ and the remaining $dividend$ when the number is divided by $2$.
Examine the illustration below:

This review provides a detailed analysis of the solution to convert a decimal number to binary number.

Recursion Fundamentals

Iteration Vs. Recursion

Recursion with Numbers

Recursion with Strings

Recursion with Arrays

Recursion with Data Structures

Conclusion

Solution Review: Convert Decimal Number to Binary Number

Solution: Using Recursion

Explanation: