How should I practice Factorial Without Multiplication?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Wayve phone screen problems in FastPrep.

Is Factorial Without Multiplication associated with Wayve?

FastPrep tags this as a Wayve phone screen coding practice problem when the problem catalog has that company and stage context.

Factorial Without Multiplication

Wayve● EasyFULLTIMEPHONE SCREEN

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Problem statement

Return n! without using the multiplication operator. Implement multiplication through repeated addition. Return -1 when n is outside the supported range 0..12.

Function

factorialWithoutMultiplication(n: int) → int

Examples

Example 1

n = 5return = 120

Repeated addition builds 1 × 2 × 3 × 4 × 5 = 120 without using the multiplication operator.

Example 2

n = 0return = 1

By definition, zero factorial is one.

Constraints

-100 <= n <= 100
Do not use multiplication in the submitted function.