Print to terminal instead of to jupyter notebook

When working with Julia, it is common to print output to the Jupyter notebook. However, there may be instances where you want to print to the terminal instead. In this article, we will explore three different ways to achieve this.

Option 1: Using the println() function

The simplest way to print to the terminal in Julia is by using the println() function. This function takes a string as an argument and prints it to the standard output. Here is an example:


println("Hello, terminal!")

This code will print the string “Hello, terminal!” to the terminal.

Option 2: Redirecting output to the terminal

If you want to redirect all output to the terminal instead of the Jupyter notebook, you can use the redirect_stdout() function. This function takes a file-like object as an argument and redirects all subsequent output to that object. Here is an example:


using Printf

# Create a file-like object that represents the terminal
terminal = IOBuffer()

# Redirect output to the terminal
redirect_stdout(terminal)

# Print to the terminal
@printf(terminal, "Hello, terminal!")

# Get the output from the terminal
output = String(take!(terminal))

# Print the output
println(output)

This code will redirect the output to the terminal object, which represents the terminal. The @printf() macro is used to print to the terminal. Finally, the output is retrieved from the terminal object and printed to the terminal.

Option 3: Using the C printf function

If you want more control over the formatting of the output, you can use the C printf function from the Libc module. This function allows you to format the output using format specifiers. Here is an example:


using Libc

# Print to the terminal using C printf
@printf(c"Hello, terminal!n")

This code uses the @printf() macro from the Libc module to print the string “Hello, terminal!” to the terminal. The c"..." syntax is used to pass a C string literal to the @printf() macro.

After exploring these three options, it is clear that the best option depends on your specific requirements. If you simply want to print a string to the terminal, using the println() function is the easiest and most straightforward option. However, if you need more control over the formatting of the output, using the C printf function or redirecting output to the terminal may be more suitable.

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