Round Function

[Joe Caverly]

While TCC does not have a round function, the PSHELL command and/or function can be used to round a number;

echo %@pshell[[math]::Round(22/7)]
3

..or...

pshell /s "$a=22/7"
echo %@pshell[$a]
3.14285714285714

echo %@pshell[[math]::Round($a)]
3

Joe

 

[Joe Caverly]

The .NET [math]::Round Method offers additional conventions. Take a look at the Microsoft documentation for more, including;

Rounding Away From Zero
Round to the nearest, or banker's rounding

...and other examples.

Joe

 

[Rick Reinckens]

For rounding to the nearest integer the easiest way is to add 0.5 and modulus divide by 1. So, for instance:

set myval=3.49999
echo %@eval[(%myval+.5)\1]

 

[samintz]

TCC also has the @CEILING and @FLOOR functions.

 

[dcantor]

This also works:

echo %@eval[3.14=0]
3
echo %@eval[3.57=0]
4

 

[Rick Reinckens]

This also works:

echo %@eval[3.14=0]
3
echo %@eval[3.57=0]
4

Good point!

That probably should be mentioned expressly in the Help. When I first saw the post I thought "That looks like a programming error--he's comparing 3.14 to 0?? In a math function, not a logic function?"

 

[drwtsn32]

That probably should be mentioned expressly in the Help.

I see it documented at the bottom of the @EVAL help page.... the part that starts with "if displayformat is i.a, then..."

 

[Rick Reinckens]

I see it documented at the bottom of the @EVAL help page.... the part that starts with "if displayformat is i.a, then..."

I did see that--but it's not clear that setting it to 0 will cause a simple "round to nearest integer".

I doubt that most people would think "Why not use @eval and set the precision to 0?" Like the original poster, most people would be thinking "Where is the @ROUND[] function? Maybe TCC uses a different name?"

 

[dcantor]

I did see that--but it's not clear that setting it to 0 will cause a simple "round to nearest integer".

I doubt that most people would think "Why not use @eval and set the precision to 0?" Like the original poster, most people would be thinking "Where is the @ROUND[] function? Maybe TCC uses a different name?"

Yeah? Well *I* thought of it. Maybe it's because I'm an ancient FORTRAN programmer. :-)

 

[Charles Dye]

Yeah? Well *I* thought of it. Maybe it's because I'm an ancient FORTRAN programmer. :-)

That seems more intuitive to me than launching an instance of PowerShell. Which is kind of like mounting a military invasion of Russia to get a cup of tea.