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readline

readline(stream=STDIN)

Read a single line of text, including a trailing newline character (if one is reached before the end of the input), from the given stream (defaults to STDIN),

Examples

julia> foo = readline();
abc
julia> print(foo);
"abc\n"

Reading from a file

julia> fp = open("helloworld.txt");    
julia> readline(fp)     # read first line
"hello\n"
julia> readline(fp)     # read second line
"world\n"

1. Read a line from standard input:

   julia> line = readline()
   Hello, World!
   "Hello, World!\n"

   This example reads a single line of text from the standard input (STDIN) and assigns it to the variable line.

2. Read a line from a file:

   julia> file = open("data.txt")
   julia> line = readline(file)
   "This is line 1\n"

   Here, the readline function is used to read a line from a file named "data.txt" that has already been opened using the open function.

3. Read a line from a custom input stream:

   julia> input = IOBuffer("Custom input stream\n")
   julia> line = readline(input)
   "Custom input stream\n"

   In this example, a custom input stream input is created using IOBuffer. The readline function is then used to read a line from this custom input stream.

4. Handle an empty input line:

   julia> line = readline()
   ""

   If the input line is empty (contains no characters), the readline function returns an empty string.

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