A variable is a symbol for a number that we don't yet know. It is usually a letter such as x or y.
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if a number can change randomly it is called a variable
do you mean math equation? If you add a number to both sides of an equation you do not change it. That is called algebra
1.34 x 10 to the 6th power. And it is called scientific notation ... not number. 1340000 is just as scientific as 1,34 million.
VARIABLE. When this variable has a fixed number assigned to it and does not change, it is called a "fixed variable".
You can change your number in your settings. Go to your settings and press phone. Then press my number. You can now change your number.