What is `float64`?

float64 is a data type in programming, particularly in languages like Go and Python, that represents a double-precision floating-point number. Here are some key points about float64:

1. Precision: It uses 64 bits to store the number, allowing for a high degree of precision. This means it can represent very large or very small numbers, as well as decimal values.

2. Range: The range of values that can be represented by float64 is approximately ±1.8 × 10^308, with a precision of about 15 to 17 decimal digits.

3. Usage: It is commonly used in scientific computing, financial calculations, and any application where precision in decimal representation is important.

4. Comparison with Other Types: In contrast to float32, which uses 32 bits and has lower precision and range, float64 is preferred when more accuracy is required.

In programming, you can typically define a variable as float64 to ensure it can handle decimal values accurately. For example, in Go:

var price float64 = 19.99

This ensures that price can store decimal values with high precision.