Question

.
What are Variables ? Discuss the scope and lifetime of local and global
variables.​

Answer 1

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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.

Answer 2

Answer:

all the alphabets which do not have a proper value

we use them for solving equations

variable vary means different

able mean value

means different value at every place