I have not succeeded to declare single variable with exponent.
Only information about single variable is on Oshhonsoft home page. It is 4 byte modified IEE754 format with 7-digit precision.
Lcdout #x shows single variable with 7-digits
eg. 98765.123 -> 98765.12
9876.123 -> 9876.123
98765432 and negative numbers display garbage.
Single variable could be displayed with exponent in Lcdout by scaling it between 1-9 by multiplying or dividing by 10 and counting the exponent.
For example positive single x greater than 10
exponent=0 ' byte variable
while x>=10
x=x/10
exponent=exponent+1
wend
then converting integer and decimal parts to long variables:
i=x
x2=x-i ' x2 is single
j= 100000*x2 ' 6 digits decimal
Lcdout #i,"."#j,"E",#exponent
If x is smaller than 1 then repeat with multiplying by 10
Lcdout #i,"."#j,"E-",#exponent
Negative numbers should be handled separately eg. by first converting to positive with multiplying by -1.