Numeric Buttons
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The numeric buttons along with the decimal button and plus/minus button are defined below:

btn0 Zero Button  
Enters the number zero into the numeric display.  
Keyboard = 0  
 
 
btn00 Double Zero Button  
Enters two zeros into the numeric display.  
Keyboard = Z  
 
 
btn000 Triple Zero Button  
Enters three zeros into the numeric display.  
Keyboard = X  
 
 
btn1 One Button  
Enters the number one into the numeric display.  
Keyboard = 1  
 
 
btn2 Two Button  
Enters the number two into the numeric display.  
Keyboard = 2  
 
 
btn3 Three Button  
Enters the number three into the numeric display.  
Keyboard = 3  
 
 
btn4 Four Button  
Enters the number four into the numeric display.  
Keyboard = 4  
 
 
btn5 Five Button  
Enters the number five into the numeric display.  
Keyboard = 5  
 
 
btn6 Six Button  
Enters the number six into the numeric display.  
Keyboard = 6  
 
 
btn7 Seven Button  
Enters the number seven into the numeric display.  
Keyboard = 7  
 
 
btn8 Eight Button  
Enters the number eight into the numeric display.  
Keyboard = 8  
 
 
btn9 Nine Button  
Enters the number nine into the numeric display.  
Keyboard = 9  
 
 
btndecimal Decimal Button  
Enters the decimal into the numeric display. The value on this button changes based on your Windows Control Panel Regional Settings.  
 
 
btnplusminus +/- (Plus/Minus) Button  
Reverses the sign of the displayed number. For example, if you want to multiply 3 times -5, enter 3 ยด 5 +/- = and the result will be -15.  
Keyboard = F9  
 

See also:
Operator Buttons  
Clear Buttons  
Function Buttons  
Memory Buttons