데타 사용 and 변수

what are variable?

labels are called  variable.

types of variables?

loop variables.

summation variables.

program variables.

data types?

numeric data-type

 used to store numeric data

example:integer.double

character data-type

used to store character data

example:string

how to declare variables?  NO

what are arithmetic,relational,logical operators?

what are keywords?

what are syntax errors?