How to calculate GPA (Grade Point Average) ceiling - coldfusion

Question

I'm working on a piece ColdFusion code to calculate the grade point average. How do I format (Round up) the GPA to one decimal place?
I tried using numberFormat but I did not get the result as expected. The GPA was being rounded to the nearest whole number. Ex. when "I have GPA 3.23, the function would round it up to 3.0, instead of 3.2.
<cfdump var = "#numberFormat(totalgpa, '.0')#">
Ex.
When I have GPA 3.23, the expected result should be 3.2;
When I have GPA 3.45, the expected result should be 3.5;
When I have GPA 3.98, the expected result should be 4.0;

Answer 1

I stopped trusting CF when it comes to rounding and number precision. Here is "the Java way":
<cfoutput>
#roundWithScale(3.23, 1)# = 3.2<br>
#roundWithScale(3.45, 1)# = 3.5<br>
#roundWithScale(3.98, 1)# = 4.0<br>
</cfoutput>
<cffunction name="roundWithScale" access="public" output="false" returnType="numeric">
<cfargument name="value" type="numeric" required="true">
<cfargument name="scale" type="numeric" default="2">
<cfargument name="rounding" type="string" default="ROUND_HALF_UP">
<cfset LOCAL.BigDecimal = createObject("java", "java.math.BigDecimal")>
<cfset LOCAL.value = createObject("java", "java.math.BigDecimal").init(
toString(ARGUMENTS.value)
)>
<cfreturn LOCAL.value.setScale(
javaCast("int", ARGUMENTS.scale),
LOCAL.BigDecimal[ARGUMENTS.rounding]
)>
</cffunction>