Problema
Convert a score from 0 to 100 into a letter grade: 90 and above is A, 80–89 is B, 70–79 is C, 60–69 is D, and below 60 is F.
Implement letter_grade(score).
Input
score: The test score.
Output
Return the letter as a one-character string.
Restricciones
0 ≤ score ≤ 100
Ejemplos
Ejemplo 1
Entrada:
score = 85
Salida esperada:
expected = "B"Entrada:
long long score = 85;
Salida esperada:
std::string expected = "B";Entrada:
long score = 85;
Salida esperada:
string expected = "B";Explicación
85 is at least 80 but below 90, so the grade is B.
Ejemplo 2
Entrada:
score = 59
Salida esperada:
expected = "F"Entrada:
long long score = 59;
Salida esperada:
std::string expected = "F";Entrada:
long score = 59;
Salida esperada:
string expected = "F";Explicación
59 is below 60, so the grade is F.
Referencias
Este reto está adaptado para CodeUtility. Sigue el enunciado y las restricciones indicadas arriba.