When working with large numbers in Julia, the BigInt type comes in handy. This type allows for arbitrary precision arithmetic, which means you can perform calculations with numbers that have more digits than the standard Int type can handle.
Option 1: Using the big function
The simplest way to work with BigInt numbers is to use the big function. This function converts a number to a BigInt type, allowing you to perform calculations with it.
x = big(123456789)
y = big(987654321)
z = x + y
println(z)
In this example, we create two BigInt numbers, x and y, and then add them together to get z. The result is a BigInt number, which we can print using the println function.
Option 2: Using the parse function
If you have a string representation of a number and want to convert it to a BigInt type, you can use the parse function.
x_str = "123456789"
y_str = "987654321"
x = parse(BigInt, x_str)
y = parse(BigInt, y_str)
z = x + y
println(z)
In this example, we have two strings, x_str and y_str, which represent the numbers we want to work with. We use the parse function to convert these strings to BigInt numbers, and then perform the addition as before.
Option 3: Using the BigInt literal
If you prefer a more concise syntax, you can use the BigInt literal to directly create a BigInt number.
x = 123456789big
y = 987654321big
z = x + y
println(z)
In this example, we append the big suffix to the numbers x and y to indicate that they should be treated as BigInt numbers. The addition is then performed as usual.
Of the three options, the best one depends on your specific use case. If you have a number already and want to convert it to a BigInt type, using the big function or the parse function are good choices. On the other hand, if you are creating a new BigInt number from scratch, using the BigInt literal can be more concise.
