In informal speech, a dollar means one dollar bill or some money. People often say it to talk about small amounts of cash.
Can you give me a dollar for coffee?
I found a few dollars on the floor.
In programming, the dollar sign is used to mark variables or special commands. This use is different from money and requires technical knowledge.
Use $ to start a variable name in PHP.
The $ symbol means something special in code.
Sometimes people use 'dollar' in phrases to talk about money value or importance. It shows the price or worth of things in a figurative way.
The idea has a high dollar value here.
She gives the dollar sign to good work.
Dollar can mean old coins or units of money used in the past or in other countries. These dollars are not the same as today's US dollar.
The Spanish dollar was used long ago.
Old dollars are in the history books.
