Question

How to convert a float number to a whole number in JavaScript

Answer 1

let f = 3.5;
 
console.log(parseInt(f));
console.log(Math.round(f)); 
console.log(Math.floor(f)); 
console.log(Math.ceil(f));
console.log(Math.trunc(f));
 
  
    
/*
run:
         
3
4
3
4
3
        
*/
         

 

 

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Answer 2

let f = -3.5;
 
console.log(parseInt(f));
console.log(Math.round(f)); 
console.log(Math.floor(f)); 
console.log(Math.ceil(f));
console.log(Math.trunc(f));
 
  
    
/*
run:
         
-3
-3
-4
-3
-3
        
*/

 

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Answer 3

console.log(parseInt(2.4));
console.log(Math.round(2.4)); 
console.log(Math.floor(2.4)); 
console.log(Math.ceil(2.4));
console.log(Math.trunc(2.4));
 
  
    
/*
run:
         
2
2
2
3
2

*/

 

70+ SQL courses for beginners and professionals

Answer 4

console.log(parseInt(2.6));
console.log(Math.round(2.6)); 
console.log(Math.floor(2.6)); 
console.log(Math.ceil(2.6));
console.log(Math.trunc(2.6));
 
  
    
/*
run:
         
2
3
2
3
2

*/

 

70+ SQL courses for beginners and professionals