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#### 6.10.4 The calculator

The calculator allows quick calculations without leaving the IDE. It is a simple calculator, since it does not take care of operator precedence, and bracketing of operations is not (yet) supported.

The result of the calculations can be pasted into the text using the Ct r l-En t e r keystroke. The calculator dialog is shown in figure (6.19).

Figure 6.19: The calculator dialog

The calculator supports all basic mathematical operations such as addition, subtraction, division and multiplication. They are summarised in table (6.1).

Table 6.1: Basic mathematical operations

Operation | Button | Key
Add two numbers | + | +
Subtract two numbers |  |
Multiply two numbers | * | *
Divide two numbers | / | /
Delete the last typed digit | <- | Ba c k s p a c e
Clear display | C | C
Change the sign | + |
Do per cent calculation | % | %
Get result of operation | = | En t e r

But also more sophisticated mathematical operations such as exponentiation and logarithms are supported. The advanced mathematical operations are shown in table (6.2).

Table 6.2: Advanced mathematical operations

Operation | Button | Key
Calculate power | x^y |
Calculate the inverse value | 1/x |
Calculate the square root | sqr |
Calculate the natural logarithm | log |
Square the display contents | x^2 |
.

Like many calculators, the calculator in the IDE also supports storing a single value in memory, and several operations can be done on this memory value. The available operations are listed in table (6.3)

Table 6.3: Advanced calculator commands

Operation | Button | Key
Add the displayed number to the memory | M+ |
Subtract the displayed number from the memory | M- |
Move the memory contents to the display | M-> |
Move the display contents to the memory | M<- |
Exchange display and memory contents | M<-> |

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