It isn't always. For smaller amounts you can just as well see something like 5¢. But you will never see a price listed using both formats, like "$1 5¢" or whatever.
Quebec, in Canada, puts dollars, pounds, euros, at the end of the number. And Brazil uses it as a divider between units, like the way electronics might use 1R5 to designate a 1.5 ohm resistor. It looks like 19$95, but with the old double-striped dollar symbol, and meaning Reals instead. Bonus: The double-striped $ is called a cifrão, and has nothing to do with the initials US.
Also, I see the Euro sign after a space at the end of a number all the time. For example, 199 €.
I think the question is essentially wrong. The unit of measure is only placed before some currencies, and in some languages.
It isn't always. For smaller amounts you can just as well see something like 5¢. But you will never see a price listed using both formats, like "$1 5¢" or whatever.
Quebec, in Canada, puts dollars, pounds, euros, at the end of the number. And Brazil uses it as a divider between units, like the way electronics might use 1R5 to designate a 1.5 ohm resistor. It looks like 19$95, but with the old double-striped dollar symbol, and meaning Reals instead. Bonus: The double-striped $ is called a cifrão, and has nothing to do with the initials US.
Also, I see the Euro sign after a space at the end of a number all the time. For example, 199 €.
I think the question is essentially wrong. The unit of measure is only placed before some currencies, and in some languages.