...
${prefix}
: A variable namedprefix
with no default value.${prefix:BR}
: A variable namedprefix
with a default value ofBR
.\${prefix}
: Literal text${prefix}
that should not be treated as a variable.
...
...
${prefix}
: A variable named prefix
with no default value.
${prefix:BR}
: A variable named prefix
with a default value of BR
.
\${prefix}
: Literal text ${prefix}
that should not be treated as a variable.
...