How to insert the value of an Array within another Array

Question

I’m trying to separate students according to their numbers in the notebook where students grade A would be students numbering over 170, students B students numbering 160 to 169 and students C numbering 150 to 159.

I’m trying to get you back on the console like this: student Receive [170, 170, 171, 187, 191] and with alunosB and C the same. more does not appear I did like this below but only appears me Undefined and when I put in the function parameter the variable alunoA= even appears something else and only the same number independent of the variable.

var numeroCardeneta = [170, 159, 151, 187, 156, 191, 165, 154, 167, 169, 171, 170, 160]

var alunosA = []
var alunosB = []
var alunosC = []

function classes(numeroCardeneta) {
    for (var i = 0; i < numeroCardeneta.length; i++){
        if (numeroCardeneta[i] >= 150 && numeroCardeneta[i] <=159){
            alunosNotaC.push(numeroCardeneta[i])
            return alunosNotaC
        } else if (numeroCardeneta[i] >= 160 && numeroCardeneta[i] <= 169){
            alunosNotaB.push(numeroCardeneta[i])
            return alunosNotaB
        } else if (numeroCardeneta[i] >= 170){
            alunosNotaA.push(numeroCardeneta[i])
            return alunosNotaA
        }
    }
}

console.log(classes(alunosNotaA))

Answer 1

The problem with your code is that you are using the return within the repetition structure. This causes the program to exit the function and consequently, interrupt the repetition loop.

Another error of the code, is that you are passing as argument to the function the array alunosA, array that has no element. Therefore, the function will not return any value, making the printing undefined.

To fix the problem, remove all statements return of its function and pass as argument the array numeroCardeneta. Or better yet, in your case you don’t even need to create this parameter in the function, since you can access the array in the most internal scopes.

Below is the corrected code:

var numeroCaderneta = [170, 159, 151, 187, 156, 191, 165, 154, 167, 169, 171, 170, 160];

var alunosNotaA = [];
var alunosNotaB = [];
var alunosNotaC = [];

function definirClasses() {
    for (var i = 0; i < numeroCaderneta.length; i++){
    
        const numero = numeroCaderneta[i];
    
        if (numero >= 150 && numero <= 159) {
            alunosNotaC.push(numero);

        } else if (numero >= 160 && numero <= 169) {
            alunosNotaB.push(numero);

        } else if (numero >= 170){
            alunosNotaA.push(numero);
        }
    }
}

definirClasses();
console.log("Classe A:", alunosNotaA);
console.log("Classe B:", alunosNotaB);
console.log("Classe C:", alunosNotaC);