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Simple operations with numbers and arrays in Javascript

Jan 06, 2025 am 01:35 AM

Operações simples com números e arrays em Javascript

Hi everyone, here are some things I learned with numbers and arrays:
note: to start with vscode create a folder on your computer, open vscode go to "Open folder" open your folder create a new file with "New file" and name it with .js at the end "Example.js" and to run your code open a New terminal and type Example.js

sum:

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let x = 6;

let y = 5;

x+=y;

console.log(x);

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subtraction:

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let x = 6;

let y = 5;

x-=y;

console.log(x);

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multiplication:

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let x = 6;

let y = 5;

x*=y;

console.log(x);

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division:

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let x = 6;

let y = 5;

x/=y;

console.log(x);

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increment:

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let x = 10;

x++;

console.log(x);

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decrement:

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let x = 10;

x--;

console.log(x);

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checking:

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let x = 11;

let y = 5;

 

 

console.log(x<y);

console.log(x>y);

console.log(x==y); //verifica se o valor de x é igual o de y

console.log(x===y); //verifica se o valor E O TIPO de x é igual ao y

console.log(x!=y); //verifica se o valor de x é diferente o de y

console.log(x!==y); //verifica se o valor E O TIPO de x é diferente ao y

//nesse último caso Como os valores já são diferentes (11 ≠ 5),

//a comparação retorna true imediatamente, sem necessidade de verificar o tipo.

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conditionals:

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let x = 11;

 

if (x>5) {

    console.log("X é maior que 5");

} else{

    console.log("X é menor que 5");

}

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return each element of the array:

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var computador = ["memoria", "disco", "placa mae", "processador"];

console.log(computador);

console.log(computador[0]);

console.log(computador[1]);

console.log(computador[2]);

console.log(computador[3]);

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show array size:

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var computador = ["memoria", "disco", "placa mae", "processador"];

console.log("Quantidade de elementos: ",computador.length);

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using push:

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var v = [];

v.push(10);

v.push(20);

v.push(30);

v.push(40);

v.push(50);

console.log(v);

//adiciona esses números ao array com push

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using pop:

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var v = [];

v.push(10);

v.push(20);

v.push(30);

v.push(40);

v.push(50);

console.log(v);

 

console.log('pop', v.pop(), v); //elimina o elemento 50

console.log('pop', v.pop(), v); //elimina o elemento 40

console.log('pop', v.pop(), v); //elimina o elemento 30

console.log('pop', v.pop(), v); //elimina o elemento 20

console.log('pop', v.pop(), v); //elimina o elemento 10

 

//pop sempre eliminará primeiro o último e seguindo a partir dele

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