Calculator-App/javascript.js at master · Chinemere/Calculator-App · GitHub

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function getNumber(num){
    var input_var = document.getElementById("input");
    switch(num){
    case 1:
        input_var.value= input_var.value+"1";
        break;


    case 2:
        input_var.value+="2";
        break;

    case 3:
        input_var.value+="3";
        break;

    case 4:
        input_var.value+="4";
        break;

    case 5:
        input_var.value+="5";
        break;

    case 6:
        input_var.value+="6";
        break;

     case 7:
         input_var.value+="7";
         break;

    case 8:
        input_var.value+="8";
         break;


    case 9:
            input_var.value+="9";
             break;


        case 0:
                input_var.value+="0";
                 break;
            }
}

// Get the Mathematical operation sign

// clear the screen
function clearScreen(){
    document.getElementById("input").value="";
    document.getElementById("answer").value="";
}

function getOperand(operand){
    var input_var = document.getElementById("input")
    switch(operand){
        case "+":
            input_var.value+= "+"
            break;

            case "-":
            input_var.value+= "-"
            break;

            case "x":
            input_var.value+= "*"
            break;

            case "/":
            input_var.value+= "/"
            break;

            case "+/-":
            input_var.value+= "-" //+ input_var.value
            break;


    }
}

// Backspace function
function backspace(){
    var input_var = document.getElementById("input")
    var x = input_var.value;
    if(x.length>0){
        x= x.substring(0, x.length-1);
        input_var.value= x;
    }
}

function compute(){
    var input_var =document.getElementById("input")
    ans = eval(input_var.value);
    document.getElementById("answer").value=  ans;
}


var i = 0;
 function getBracket(){
     var input_var = document.getElementById("input");
     if (i==0){
         input_var.value+="("
         i=1;
     } else if (i==1){
         input_var.value+=")"
         i=0;

     }
 }