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Version: 1.0.0b1
For the complete Mojo documentation index, see llms.txt. Markdown versions of all pages are available by appending .md to any URL (e.g. /docs/manual/basics.md).

isatty

isatty(fd: Int) -> Bool

Checks whether a file descriptor refers to a terminal.

Returns True if the file descriptor fd is open and connected to a tty(-like) device, otherwise False. On GPUs, the function always returns False.

Examples:

from std.os import isatty

# Check if stdout (fd=1) is a terminal
if isatty(1):
print("Running in a terminal")
else:
print("Output is redirected")

Args:

  • fd (Int): A file descriptor.

Returns:

Bool: True if fd is connected to a terminal, False otherwise.