When trading on platforms like Binance, you'll often encounter transaction pairs displaying volume or turnover with "M" or "B" units. This guide demystifies these notations and provides a practical implementation approach.
Cryptocurrency Unit Basics
Key Quantity Abbreviations
- B = Billion (1B = 1,000,000,000)
- M = Million (1M = 1,000,000)
- T = Trillion (1T = 1,000,000,000,000)
In crypto contexts, "M" universally represents millions. The European Banking Authority defines virtual currencies as "digital representations of value" that function as payment methods through public acceptance.
Practical Implementation
Step 1: String Arithmetic Operations
Essential methods for string-based calculations:
func Calc(a string, b string, op int, pcs int) (string, error) {
decimal.DivisionPrecision = pcs
ad, err1 := decimal.NewFromString(a)
bd, err2 := decimal.NewFromString(b)
if err1 != nil || err2 != nil {
return "0.00", errors.New(fmt.Sprintf("Calc fail,err1=%v,err2=%v", err1, err2))
}
if op == 1 {
ad = ad.Add(bd)
} else if op == -1 {
ad = ad.Sub(bd)
} else if op == 2 {
ad = ad.Div(bd)
} else if op == 3 {
ad = ad.Mul(bd)
}
return fmt.Sprintf("%v", ad), nil
}
// Helper functions for Add/Sub/Div/Mul
func Add(a string, b string) (r string, err error) { /*...*/ }
func Sub(a string, b string) (r string, err error) { /*...*/ }
func Div(a string, b string) (r string, err error) { /*...*/ }
func Mul(a string, b string) (r string, err error) { /*...*/ }
// Comparison utilities
func Equal(s1 string, s2 string) bool { /*...*/ }
func LessThan(s1 string, s2 string) bool { /*...*/ }Step 2: Precision Handling
Truncate decimals to desired accuracy:
func PrecisionValue(value string, precision int) string {
if strings.Contains(value, ".") {
ss := strings.Split(value, ".")
if len(ss[1]) > precision {
return ss[0] + "." + ss[1][:precision]
}
}
return value
}Step 3: Unit Conversion Logic
Add "B" or "M" based on value magnitude:
func UnitValue(strnum string, precision int) string {
sdivision := strings.Split(strnum, ".")
sl := sdivision[0]
if len(sl) >= 10 {
value, _ := libra.Div(sl, "1000000000")
return PrecisionValue(value, precision) + "B"
}
if len(sl) >= 7 {
value, _ := libra.Div(sl, "1000000")
return PrecisionValue(value, precision) + "M"
}
return PrecisionValue(strnum, precision)
}FAQs
Q1: Why use "M" instead of writing "million"?
A1: Abbreviations save space in UI displays while maintaining clarity for traders accustomed to these notations.
Q2: How accurate are string-based calculations?
A2: Using libraries like decimal ensures precision by avoiding floating-point errors common in direct numeric operations.
Q3: Can these methods handle negative values?
A3: Yes, the subtraction (Sub) and comparison functions account for negative numbers.
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Q4: Are there performance trade-offs with string math?
A4: While slightly slower than native numeric operations, the precision benefits outweigh minimal latency impacts in trading contexts.
Q5: How do I extend this for "T" (trillions)?
A5: Modify UnitValue() to check len(sl) >= 13 and divide by 1 trillion.
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Key Takeaways
- Standardize unit displays for readability.
- Prioritize precision in financial calculations.
- Extendable code supports future unit requirements.
By implementing these methods, you'll enhance data presentation and user experience in crypto platforms.