Rewrite the following set of if statements using a nested if

Rewrite the following set of if statements using a nested if-else structure.

if (score >= 90) grade = \'A\';

if (score >= 80 && score < 90)

grade = \'B\';

if (score >= 70 && score < 80) grade = \'C\';

if (score >= 60 && score < 70) grade = \'D\';

if (score < 60) grade = \'F\';

Solution

if (score >= 90) grade = \'A\';
else if (score >= 80) grade = \'B\';
else if (score >= 70) grade = \'C\';
else if (score >= 60) grade = \'D\';
else grade = \'F\';