var summation = function(num) {
if (num <= 0) {
console.log("number should be greater than 0");
} else {
return (num + summation(num - 1));
}
};
console.log(summation(5));it gives me NaN error but i want summation of number.where am i making mistake?
In your last iteration, you correctly check whether the input is <= 0, but then return nothing, which results in an implicit return value of undefined.
Adding undefined to a number results in NaN:
console.log(1 + undefined); // NaNTo resolve this, return 0 if your cancellation condition has been hit:
var summation = function(num) {
if (num <= 0) {
console.log("number should be greater than 0");
return 0;
} else {
return (num + summation(num - 1));
}
};
console.log(summation(5));
Try
var summation = function (num) {
if(num <=0){
console.log("number should be greater than 0");
return 0;
}
else{
return(num + summation(num-1));
}
};
console.log(summation(5));
var summation = function (num) {
if(num <=0){
console.log("number should be greater than 0");
return(0);
}else{
return(num + summation(num-1));
}
};
console.log(summation(5));there was no terminate statement for recursion earlier
