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if-statementfish

In fish shell, how can I put two conditions in an if statement?

What I want to do using bash:

> if true; then echo y; else echo n; fi
y
> if false; then echo y; else echo n; fi
n
> if false || true; then echo y; else echo n; fi
y

Now trying with fish:

> if true; echo y; else; echo n; end
y
> if false; echo y; else; echo n; end
n

# Here 'or true' are just two arguments for false
> if false or true; echo y; else; echo n; end 
n

# Here 'or true;' is a command inside the if
> if false; or true; echo y; else; echo n; end 
n

# Can't use command substitution instead of a command
> if (false; or true); echo y; else; echo n; end
fish: Illegal command name “(false; or true)”

How can I have two conditions in an if?

Solution

  • Two other approaches:

    Approach one:

        if begin false; or true; end
      echo y
    else
      echo n
    end

    Approach two:

        false; or true
    and echo y
    or echo n