The symbol for a a square root sign is: √
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The only thing that a square root symbol does is that it symbolises an operation (taking the square root) of whatever is under the sign.
The symbol used to indicate a nonnegative square root.
Usually, in code, the square root symbol is denoted as: sqrt() where the number inside the square root is written inside the brackets. For example, if you wanted the square root of 64, write: sqrt(64)
The square root sign is called a radical
The name of the tail on the square root sign is the radical.