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Cómo registrar cuántas posibilidades cumplen la declaración if javascript

 const grades = [9, 8, 5, 7, 7, 4, 9, 8, 8, 3, 6, 8, 5, 6]; for (let i = 0; i < grades.length; i++) { if (grades[i] >= 8) { console.log(grades[i]) } }

Estoy tratando de registrar cuántos elementos de la matriz cumplen la condición. la salida que estoy buscando es: 6 (porque 6 de los números son iguales o mayores que 8)

intentó

dejar contar = 0; for (sea i = 0; i < grados.longitud; i++) {

if (grados[i]>= 8){ contar++

 console.log(count) }

}

about 4 years ago · Juan Pablo Isaza
2 answers
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function countGreaterThan8(grades){ // initialize the counter let counter = 0; for (let i = 0; i < grades.length; i++) { // if the condition satisfied counter will be incremented 1 if (grades[i] >= 8) { counter++; } } return counter; } const grades = [9, 8, 5, 7, 7, 4, 9, 8, 8, 3, 6, 8, 5, 6]; console.log(countGreaterThan8(grades)); // 6
about 4 years ago · Juan Pablo Isaza Report

0

Puede llamar a Array.filter para crear una nueva matriz que contenga solo elementos que cumplan la condición. Luego puede hacer uso de la longitud de la matriz como desee. Como esto

 const grades = [9, 8, 5, 7, 7, 4, 9, 8, 8, 3, 6, 8, 5, 6]; const gradesThatPassCondition = grades.filter(grade => grade > 6); console.log(gradesThatPassCondition.length);
about 4 years ago · Juan Pablo Isaza Report
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