for loop - cppreference.com

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Executa um loop.

Original:

Executes a loop.

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Sintaxe


`for (` init_expression `;` cond_expression `;` iteration_expression `)` loop_statement

Explicação

A sintaxe acima produz o equivalente a codificar:

Original:

The above syntax produces code equivalent to:

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{

init_expression ;

while ( cond_exression ) {

loop_statement

iteration_expression ;

}

O init_expression é executado antes da execução do loop. O cond_expression deve avaliar em valor, conversível a bool. Ela é avaliada antes de cada iteração do loop. O loop continua somente se seu valor é true. O loop_statement é executado em cada iteração, após o que é executada iteration_expression.

Original:

The init_expression is executed before the execution of the loop. The cond_expression shall evaluate to value, convertible to bool. It is evaluated before each iteration of the loop. The loop continues only if its value is true. The loop_statement is executed on each iteration, after which iteration_expression is executed.

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Palavras-chave

for

Exemplo

#include <iostream>

int main() 
{
    for (int i = 0; i < 10; i++) {
        std::cout << i << " ";
    }

    std::cout << '\n';
    
    for (int j = 2; j < 9; j = j + 2) {
        std::cout << j << " ";
    }
}

Saída:

0 1 2 3 4 5 6 7 8 9
2 4 6 8