Why do i get extra undefined in last row of my output?

The_new_elixiR

This is my code:

function triangle1(n , shape){
    let ajib =[];
    for (let row = 1; row <= n; row++) {
        let b ="";
        let a="";
        
        for (let space = 1; space <= n - row; space++) {
            b= b + " ";
        }
    
    
        for (let star = 1; star <= row; star++) {
            a = a + shape + " "; ///" " will make an Equilateral triangle 
        }
       
        let c = b + a;
        
        console.log(c);

        ajib.push(c);
        //return c ;

    
    }
    
    console.log(ajib)
   

}
console.log(triangle1(5,"a"))

This is my the output:

    a 
   a a 
  a a a 
 a a a a 
a a a a a 
[ '    a ', '   a a ', '  a a a ', ' a a a a ', 'a a a a a ' ]
undefined

First: i do not know where this undefined thing come from!

How can i get rid of it?

Second: when i use return c; instead of console.log(c) to output each row i get a wrong result like :

Why does this happen and how can i solve it?

Scrapper142

Its from console.log(triangle1(5,"a")) because triangle has no return value. It correctly prints the letters while running the function, then undefined since the return value of triangle is undefined Second: when you use return c you are ending the function immediately. Add it to a list and return the list

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