Integers to roman rumeral converter

integers-to-roman-rumeral-converter.markdown

Integers to roman rumeral converter

A Pen by Robert Van Housen on CodePen.

License.

script.js

function convertToRoman(num) {
  // noprotect
  var romeNum = [];
  var mCount = 0;
  var cCount = 0;
  var iCount = 0;
  var xCount = 0;
  
  if (num >= 1000) {       /////// Multiples of 1000
        mCount = parseInt(num/1000);
        cCount = parseInt((num - mCount*1000)/100);
        xCount = parseInt((num - (mCount*1000) - (cCount*100))/10);
        iCount = parseInt(num - mCount*1000 - cCount*100 - xCount*10);
    }
  else{
        cCount = parseInt(num/100);        
        xCount = parseInt((num - cCount*100)/10);        
        iCount = parseInt(num - cCount*100 - xCount*10);
    
    } 
        if (mCount >= 1) {
            for (var i = 0 ; i < mCount; i++) {
              romeNum.push("M");      
            }
        }
  
        if (cCount >= 9) {     ////// Greater or equal to 900 
            romeNum.push("CM");                       
        }
    
        if (cCount >= 8 && cCount < 9) {     
            romeNum.push("DCCC");                       
        }
    
        if (cCount >= 7 && cCount < 8) {     
            romeNum.push("DCC");                     
        }
    
        if (cCount >= 6 && cCount < 7) {     ////// Between 600 and 700 
            romeNum.push("DC");                      
        } 
    
        if (cCount >= 5 && cCount < 6) {     ////// Between 500 and 600 
            romeNum.push("D");                      
        }  
    
        if (cCount < 5 && cCount >= 4) { //// Between 400 and 500     
        romeNum.push("CD");        
        } 
    
        if (cCount < 4) {          
          for (var k = 0; k < cCount; k++){ 
          romeNum.push("C");
          } 
        }
    
        if (xCount >= 9 ) {      
        romeNum.push("XC");          
        }     
    
        if (xCount >= 8 && xCount < 9 ) {      
        romeNum.push("LXXX");          
        }    
    
        if (xCount >= 7 && xCount < 8 ) {      
        romeNum.push("LXX");          
        }      
    
        if (xCount >= 6 && xCount < 7 ) {      
        romeNum.push("LX");          
        } 
     
        if (xCount >= 5 && xCount < 6 ) {      
        romeNum.push("L");          
        } 
  
        if (xCount >= 4 && xCount < 5) {  // between 40 and 50
            romeNum.push("XL");
        }
      
        if (xCount < 4 ) {      
        for (var l = 0; l < xCount; l++){ 
          romeNum.push("X");
          }
      } 
  
      if (iCount === 9) {
      romeNum.push("IX");    
      } 
  
      if (iCount === 8) {
      romeNum.push("VIII");    
      }  
  
      if (iCount === 7) {
      romeNum.push("VII");    
      } 
  
      if (iCount === 6) {
      romeNum.push("VI");    
      } 
  
      if (iCount === 5) {
      romeNum.push("V");    
      }
  
      if (iCount === 4) {
      romeNum.push("IV");    
      } 
  
      if (iCount < 4) {        
        for (var m = 0; m < iCount; m++) {
        romeNum.push("I");    
        }           
      } 
   
      console.log(romeNum.join(""));    
  
}
convertToRoman(3999);