I want to create calculator which will show discount base don number of students.
1 studnet & 1 course=  0 discount, 1 student & many courses = 10*coursenumber  & so on.
i have written code but showing error  for 
conditipn expression mustbe booleasn, unexpected token{, 

controller: 
public class calculatorclass {
    
    public integer studentNumber{get;set;}
    public integer CoursesNumber{get;set;}
    public double Discount{get;set;}
    
    public void Discount(){
        
        if (studentNumber= 1 && CoursesNumber= 1  )
        {
            Discount=0;
        }
                 else if (studentNumber= 1 && CoursesNumber > 1  )
        { 
            Discount= 10 * CoursesNumber ;
        }
         else if (studentNumber> 1 && CoursesNumber = 1  )
        { 
            Discount= 15 * studentNumber;
           
        }
         else if (studentNumber> 1 && CoursesNumber > 1  )
        { 
            Discount= (15 * studentNumber)+ (10*CoursesNumber );
                If(Discount >60) 
               Discount= 60;
            else
            { 
                discount =(15 * studentNumber)+ (10*CoursesNumber ) ;
                }
               }
}
}

VFP: 
<apex:page controller= "calculatorclass ">
    <apex:form>
    <apex:pageBlock title= "discount Calculator" >
        <apex:OutputLabel value="Number of student"/>
        <apex:inputText value="{!studentNumber}"/>
        
        <apex:OutputLabel value="Number of Courses"/>
        <apex:inputText value="{!CoursesNumber}"/>
        <apex:CommandButton value="calculate discount" action="{!Discount}"/>
        <apex:OutputLabel id="id1"> {!Discount} </apex:OutputLabel>
        
        </apex:pageBlock>
    
    </apex:form>
</apex:page>