creating a random equation

[Arelle]

im having a bit of difficulty on this one...

how would you go about creating a random equation? i would like to randomly generate two individual numbers, a random operator (out of +, -, *, /) between these numbers and then the user would input a number to answer the equation... any thoughts on this?

[excogitator]

Use Math.random to select a number. Pick an element from the operator array containing ["+", "-", "*", "/"].
Again Math.random for getting the first and second numbers within a range.
Use a string conditional check for the operator selected and perform the necessary calculations to check the result.


Hope that helps.

[Arelle]

thanks for that, umm i have been able to create random number and also random operators from an array, but i think i may have confused myself... how would you go about performing the calculations?

[excogitator]

switch(moperator)
{
    case "+":
        mresult=mnum1+mnum2;
        break;
    case "-":
        mresult=mnum1-mnum2;
        break;
    case "*":
        mresult=mnum1*mnum2;
        break;
    case "/":
        mresult=mnum1/mnum2;
        break;
}
txtresult.text=mresult;

[senocular]

^ if you don't need the operator string (i.e. "+") for anything else, you an actually skip the operator in the array middleman and do excogitator's switch directly with the random numbers