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recursion.js

// ============================================================
// Recursion with one parameter
// ============================================================

const factorial = (num) => {
   if (num === 1) {
      return 1;
   }

  return num * factorial(num - 1);
}

console.log(factorial(5)); // 120

// ============================================================
// Recursion with two parameters
// ============================================================

const power = (base, exponent) => {
  if (exponent === 0) {
    return 1
  }

  return base * power(base, exponent - 1)
}

console.log(power(2, 3)); // 8

recursion.py

# ============================================================
# Recursion with one parameter
# ============================================================

def factorial(n):
    if n == 1:
        return n
    else:
        return n * factorial(n - 1)

print(factorial(5)) # 120

# ============================================================
# Recursion with two parameters
# ============================================================

def power(base, exponent):
    if exponent == 0:
        return 1
    return base * power(base, exponent - 1)

print(power(2, 3))  # 8