main(); function main() { var userInput = prompt("▪️Example: 2 5 *3\n▪️Negative Integers allowed\n▪️Swapping of range bounderies allowed: \n (6 3 %2 becomes 3 6 %2)\n▪️Float values are converted to Int") try { if(userInput == "" || userInput === null) { alert("No input, \n-terminating program-") return; } userInput = userInput.trim() if(userInput.match(/[0-9]/) == false) { alert("Please provide all required parameters!"); main(); } if(userInput.match(/[0-9]/gm).length < 3) { alert("Please provide all required parameters!"); main(); } if(!userInput.includes(" ") && userInput.length > 0) { alert("Your Input has to be delimited by spaces!") main(); } }catch(e) { alert("An error occured (" + e +")") return } document.write("Input: " + userInput) var x = userInput.split(" ")[0]; var y = userInput.split(" ")[1]; var oper = ""; userInput.length > 2 ? oper = userInput.split(" ")[2].toString().split("")[0] + userInput.split(" ")[2].toString().split("")[1] : oper = ""; sumRange(x, y, oper); } function sumRange(x, y, oper) { var x = parseInt(parseFloat(x).toFixed(1)); var y = parseInt(parseFloat(y).toFixed(1)); if(x > y) { var temp = x; x = y y = temp } var range = []; for(let i=x, len=y; i<=y; i++) { range.push(i) } document.write("

Input evaluation:

Range: " + x + "..." + y) var oper = oper; var op = oper.split("")[0]; var er = parseInt(oper.replace(op, "")); if(Number.isNaN(x) || Number.isNaN(y) || Number.isNaN(op) || Number.isNaN(er)) { alert("Illegal input!"); return } document.write("

Operator: " + op); document.write("

2nd operand: " + er + "

"); var result = 0; for(let j=0, len=range.length; j") } document.write("_______________________"); document.write("
Calculation sum: " + result); }

Summations [Challenge]