javascript convert number to binary
function dec2bin(dec){
return (dec >>> 0).toString(2);
}
dec2bin(1); // 1
dec2bin(-1); // 11111111111111111111111111111111
dec2bin(256); // 100000000
dec2bin(-256); // 11111111111111111111111100000000javascript convert number to binary
function dec2bin(dec){
return (dec >>> 0).toString(2);
}
dec2bin(1); // 1
dec2bin(-1); // 11111111111111111111111111111111
dec2bin(256); // 100000000
dec2bin(-256); // 11111111111111111111111100000000binary addition javascript
function binaryAddition(a,b){
var result = "",
carry = 0;
while(a || b || carry){
let sum = +a.slice(-1) + +b.slice(-1) + carry; // get last digit from each number and sum
if( sum > 1 ){
result = sum%2 + result;
carry = 1;
}
else{
result = sum + result;
carry = 0;
}
// trim last digit (110 -> 11)
a = a.slice(0, -1)
b = b.slice(0, -1)
}
return result;
}
// Tests
[
["0","0"],
["1","1"],
["1","0"],
["0","1"],
["10","1"],
["11","1"],
["10","10"],
["111","111"],
["1010","11"]
].forEach(numbers =>
document.write(
numbers[0] + " + " +
numbers[1] + " = " +
binaryAddition(numbers[0], numbers[1]) +
" <mark> (" +
parseInt(numbers[0], 2) + " + " +
parseInt(numbers[1], 2) + " = " +
parseInt(binaryAddition(numbers[0], numbers[1]),2) +
")</mark><br>"
)
)
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