Fish

Loops

for file in *.txt;
    echo "$file";
end

while read word;
    echo "$word"
end < /usr/share/dict/words

while test -f foo;
    true
end

Conditions

if test $status -ne 0;
    echo "oop—"
end

• -eq
• -ne
• -gt
• -ge
• -lt
• -le

• -f
• -d

if ...;
    echo something
else if ...;
    echo something_else
else;
    echo something_else_altogether
end

Variables

set foo hi

• -l — scoped local to the current block
• -g — global scope
• -x — environment variable

Command Substitution

set total (math "$total+1")