Question

How to loop through an object with for loop in JavaScript

Answer 1

const student = { 
    name: 'Tom',
    age: 35,
    hobbies: ['movies', 'reading', 'coding']
};
 
for (let key in student) { 
    let value = student[key];
 
    console.log(key + " - " +  value); 
}

   
   
/*
run:
   
name - Tom
age - 35
hobbies - movies,reading,coding
   
*/

 

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Answer 2

const student = { 
    name: 'Tom',
    age: 35,
    hobbies: ['movies', 'reading', 'coding']
};
  
for (let [key, value] of Object.entries(student)) {
    console.log(key + " - " +  value);
}

   
   
/*
run:
   
name - Tom
age - 35
hobbies - movies,reading,coding
   
*/

 

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Answer 3

const student = { 
    name: 'Tom',
    age: 35,
    hobbies: ['movies', 'reading', 'coding']
};
    
for (let key in student) { 
    let value = student[key];
    console.log(value);
    console.log(key + " - " + value[0] + ", " + value[1] + ", " + value[2]); 
    console.log("------------------");
}
 
    
    
/*
run:
    
Tom
name - T, o, m
------------------
35
age - undefined, undefined, undefined
------------------
[ 'movies', 'reading', 'coding' ]
hobbies - movies, reading, coding
------------------
    
*/

 

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Answer 4

const student = { 
    name: 'Tom',
    age: 35,
    hobbies: ['movies', 'reading', 'coding']
};
   
Object.keys(student).forEach(function(key) {
    console.log(key, student[key]);
});

   
   
/*
run:
   
name Tom
age 35
hobbies [ 'movies', 'reading', 'coding' ]
   
*/

 

70+ SQL courses for beginners and professionals