** ^{}**Introduction to BASIC

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**

a^{b}, 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.

Example.

10 PRINT 1+3*2^3 20 PRINT 2^3^3 30 END

The result of the above is as follows.

25

512

Note that 2^3^3 is appreciated as (2^3)^3.

**Complicated expressions**

Parentheses can be used to indicate the priority. Parentheses are always '(' and ')', even if they are nested.

Example

10 PRINT ((2+3)*4)^2 20 END

**Square Root**

The non-negative square root of a number can be calculated by a SQR function.

Example.

10 PRINT SQR(2) 20 END

Refer to Supplied Functions

[Note]

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.