Simple term deposit calculator that takes as inputs:

• Start deposit amount (e.g. $10,000)
• Interest rate (e.g. 1.10%)
• Investment term (e.g. 3 years)
• Interest paid (Monthly, Quarterly, Annually, At Maturity)

And produces as output:

• Final balance (e.g. $10,330 on the above inputs, interest paid At Maturity)

Compound interest, can be calculated using the formula FV = P*(1+R/N)^(N*T), where:

• FV is the future value of the loan or investment
• P is the initial principal amount (depositAmount)
• R is the annual interest rate (interestRateAnnually)
• N represents the number of times interest is compounded per year
• T represents time in years (investmentTermInYears)

Credit: https://www.realized1031.com/glossary/compound-interest

• Decimal to be used for calculating currency value
• Precision when rounding

• Download and install Go: https://go.dev/doc/install
• Version used: Go 1.19

• Please run the commands at the project folder
• Required flags:
  • -deposit (Deposit amount)
  • -rate (interest rate, annually)
  • -term (investment term, years)
  • -frequency (interest paid frequency)
• Optional flags:
  • -decimalplaces (Number of decimal places for rounding)
  • -csvtest (CSV file path to test)
• Accepted values for interest paid frequency are: 0,1,2 or 3 (which 0 = at maturity, 1 = monthly, 2 = quarterly, 3 = annually)
• Deposit amount can support large number (maximum of 2^31 digits after the decimal point)
• Interest rate is presented using float64
• Investment term is presented using int (int is a signed integer type that is at least 32 bits in size)
• Decimal places is presented using int
• CSV test file path can be provided following the example format in data/test.csv to perform multiple tests

go run . -deposit 10000  -rate 1.1 -term 30 -frequency 3

go run . -deposit 10000  -rate 1.1 -term 30 -frequency 3 -decimalplaces 2

go run . -deposit 10000  -rate 1.1 -term 30 -frequency 3 -csvtest data/test.csv

go run . --help

go test ./...

go test ./... -v

go build -o bin/upcodingactivity

GOOS=darwin GOARCH=amd64 go build -o bin/mac/upcodingactivity

GOOS=darwin GOARCH=arm64 go build -o bin/mac_m1/upcodingactivity

GOOS=windows GOARCH=amd64 go build -o bin/windows/upcodingactivity.exe

GOOS=linux GOARCH=amd64  go build -o bin/linux/upcodingactivity

./bin/mac/upcodingactivity -deposit 10000  -rate 1.1 -term 30 -frequency 3

./bin/mac/upcodingactivity -deposit 10000  -rate 1.1 -term 30 -frequency 3 -decimalplaces 2

• https://github.com/shopspring/decimal (MIT)

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