Sugarcane does not have a lot of sugar. The sugar content (12–18 %) is similar to many common fruits. eg grapes have around 16% sugars. Sugarcane juice is a moderately sweet yellow/green liquid. It is nothing like the refined sugar sold in stores.
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The refined sugar we eat is pure sucrose.
Sugar cane juice.
Image from Wikipedia.
The main advantage of sugar cane is that it is extremely cheap to grow, harvest and process.
