my math formula
P( X= x) = n_cx * p^x *q ^(n-x)
P( X =x ) = {=(combination(n,x))(p^x)((1-p)^(n-x))}
P( X < 5)
i want to write code in text blaze for P( X <5) are x's are additive like P(X=0) + P(X=1) +P(X=2)+P( X=3)+P (X=4)
i need to help to increment command and output like this P(X=0) + P(X=1) +P(X=2)+P( X=3)+P (X=4) upto X (code)
what command function need
any one help me please
Hi Sekhar.
You can use {repeat}
and {if}
commands with the seq
function together as follows:
{formtext: name=number; default=3}
{repeat: for x in seq(0, number - 1)} P (X={=x}) {if: x < number - 1}+{endif}{endrepeat}
Hope that helped you. 
Here is a small example:
{factorial=(n)->reduce(seq(1,n), 1, (a, v)->a*v) if n > 0 else 1}
{combination=(n, r)->factorial(n)/factorial(r)/factorial(n-r)}
{n=4}
{x=3}
{p=0.5}
{plist=map(seq(0,x - 1),(i)->combination(n,i)*p^i*(1-p)^(n-i))}
{=sum(plist)}
You can find information about factorial and combination functions below:
Also consider using formtext command to make calculations interactive to your input.