相关疑难解决方法(0)

什么是Kotlin中的指数运算符.我认为它会,**但它似乎在我的代码中引发错误.

when (pendingOperation) {
    "=" -> operand1 = value
    "÷" -> operand1 = if (value == 0.0) {
        Double.NaN // handle attempt to divide by zero
    } else {
        operand1!! / value
    }
    "x" -> operand1 = operand1!! * value
    "?" -> operand1 = operand1!! - value
    "+" -> operand1 = operand1!! + value
    "a^b" -> operand1 = operand1!! ** value