How to use jagged array in TypeScript

1 Answer

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// Initialize a jagged array
let jaggedArray: number[][] = [
    [1, 2, 3],
    [4, 5],
    [6, 7, 8, 9]
];

console.log(jaggedArray);
console.log();

// Accessing elements
console.log(jaggedArray[0][1]); // 2
console.log(jaggedArray[2][3]); // 9
console.log();

// Modifying elements
jaggedArray[1][1] = 99;
console.log(jaggedArray[1][1]); // 99
console.log();

// Iterating over a jagged array (print the jagged array)
let s: string = "";
for (let i = 0; i < jaggedArray.length; i++) {
    for (let j = 0; j < jaggedArray[i].length; j++) {
        s += jaggedArray[i][j] + " ";
    }
    console.log(s);
    s = "";
}
console.log();

// Adding new elements
jaggedArray[0].push(700);
console.log(jaggedArray[0]); // [1, 2, 3, 700]
console.log();

jaggedArray.push([55, 888]);
console.log(jaggedArray);

  
     
/*
run:
 
[[1, 2, 3], [4, 5], [6, 7, 8, 9]] 

2 
9 

99 

"1 2 3 " 
"4 99 " 
"6 7 8 9 " 

[1, 2, 3, 700] 

[[1, 2, 3, 700], [4, 99], [6, 7, 8, 9], [55, 888]] 
 
*/

 



answered Mar 4, 2025 by avibootz

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