what is a variable?Discuss the rules for naming the variables
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A variable is a quantity that may change within the context of a mathematical problem or experiment. Typically, we use a single letter to represent a variable. The letters x, y, and z are common generic symbols used for variables.
Explanation:
All variable names must begin with a letter of the alphabet, an underscore, or ( _ ), or a dollar sign ($). The convention is to always use a letter of the alphabet. The dollar sign and the underscore are discouraged. After the first initial letter, variable names may also contain letters and the digits 0 to 9
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this command can be used to take in a value from the user the value is called a variable
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