Keywords are specific words that are reserved as programming language commands. This words may only be used for their intended purpose some of the keywords of QBASIC programming are REM, INPUT, PRINT etc.
Arithmetic operator are used for various mathematical calculation . Arithmetic operators performed such as addition, subtraction, multiplication, division and exponentiation. A numeric expression is any collection of operators and operands. Two example of arithmetic operators are + and -.
Logical Operators combine two or more relational expressions to evaluate a single value as True (Non Zero) or False (Zero). The result of evaluation is used to make decisions about the program flow. The commonly used logical operators in QBASIC are AND, OR and NOT. It's any two types are as follows: a)AND b) OR
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