Introduction to BASIC
Four basic mathematical operations
The four operations addition, subtraction, multiplication and division are denoted by using
/ , respectively.
Example. A program that calculates 3×2 and 3÷2, and displays the results of them.
10 PRINT 3*2,3/2 20 END
Exponentiation and powers
ab, a to the b-th power, is denoted by a^b.
Example. A program that finds 2 raised to the fifth.
10 PRINT 2^5 20 END
Priority of operation
Power operation has higher priority than multiplication and division, which have higher priority than addition and subtraction.
Operations of the same priority are performed from left to right.
10 PRINT 1+3*2^3 20 PRINT 2^3^3 30 END
The result of the above is as follows.
Note that 2^3^3 is appreciated as (2^3)^3.
Parentheses can be used to indicate the priority. Parentheses are always '(' and ')', even if they are nested.
10 PRINT ((2+3)*4)^2 20 END
The non-negative square root of a number can be calculated by a SQR function.
10 PRINT SQR(2) 20 END
Refer to Supplied Functions
The Full BASIC standard demands the accuracy of power operations, SQR-functions and any other numerical supplied functions to be equivalent to that of the four operations.