Nested If Statement HELP

Question

Jonathan Ortiz 2020-10-15

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评论： Steven Lord 2020-10-15

prompt = ' enter a value between 0 and 100 ' ;
x = input(prompt) ; 
if x >= 90 && x <= 100
        disp (' Grade is A ');  
    
    if x <= 89 && x >= 80
        disp (' Grade is B '); 
    end
    
end

Wondering why it is ignorning my second if statment if I input 85 it wont display " grade is B"

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Steven Lord 2020-10-15

Others have given you alternatives. For an explanation, as you've written the code the condition of the first if statement must be satisfied for MATLAB to even evaluate the condition of the second if statement. If the first if statement's condition is not satisifed, MATLAB continues execution after the end statement associated with that if statement.

Is there any number that is simultaneously greater than or equal to 90 (from the first part of the first if condition) and less than or equal to 89 (the first part of the second if condition)?

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Answer 1

KSSV 2020-10-15

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https://ww2.mathworks.cn/matlabcentral/answers/614613-nested-if-statement-help#answer_514468

编辑：KSSV 2020-10-15

在 MATLAB Online 中打开

prompt = ' enter a value between 0 and 100 ' ;
x = input(prompt) ; 
if x >= 90 && x <= 100
    disp (' Grade is A ');  
elseif x <= 89 && x >= 80
        disp (' Grade is B '); 
end

OR

prompt = ' enter a value between 0 and 100 ' ;
x = input(prompt) ; 
if x >= 90 && x <= 100
    disp (' Grade is A ');  
end
if x <= 89 && x >= 80
        disp (' Grade is B '); 
end

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Answer 2

Sudhakar Shinde 2020-10-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/614613-nested-if-statement-help#answer_514473

在 MATLAB Online 中打开

Use elseif:

prompt = ' enter a value between 0 and 100 ' ;
x = input(prompt) ;
if x >= 90 && x <= 100
    disp (' Grade is A ');
elseif x <= 89 && x >= 80
    disp (' Grade is B ');
end