Code to run via CLI. Calculates the total investment and profit for each year of a compound interest period based on number of investment years, annual percentage return, and deposit amount (fixed) and frequency.

Run locally:

npm run calc [-- <years> <rate> <deposit-amount> <deposit-frequency>]

where the... :

• -- <years> <rate> <deposit-amount> <deposit-frequency> part is optional, and where
• <years> is to be replaced with the investment period length: the number of years of investment (default is 40 as of today),
• <rate> is to be replaced with the annual return percentage (default is 8 as of today),
• <deposit-amount> is to be replaced with the amount of money being invested (default is 1000 as of today), and
• <deposit-frequency> is to be replaced with frequency in which <deposit-amount> is being invested (Options are 0=OneTime, 1=Yearly, and 2=Monthly, and default is Monthly as of today).

For example, say we invest 1,000 NIS each month, for 40 years, and that the annual return percentage is 7%. Then:

npm run calc -- 40 1000 7 2

When running without specifying parameters' values:

npm run calc

those values get their defaults from src/utils/defaults.ts

Should improve the logic of the functions at src/utils/compoundInterest.ts.