How to add text to value in console, without breaking it-CodePudding

so the code bellow would write ten numbers in the console. How could I add some text behind, lets say, number five? So it would write numbers like usual, but the number five would have also some text to it.

for (let x = 1; x < 11; x  ) {
console.log(x);
}

CodePudding user response：

Just use a ternary condition that checks if x is 5.

for (let x = 1; x < 11; x  ) {
  console.log(x   (x == 5 ? ' text' : ''));
}

If you want the text before the number you can just move the expression like:

console.log((x == 5 ? 'text ' : '')   x)

CodePudding user response：

for(let x = 0; x < 11; x  ) {
  console.log(x === 5 ? '5 with some text' : x);
}

if I understood your questioncorrectly, this should work

CodePudding user response：

You need to create a variable to store all of the output. For example you want it to be space-separated then.

let output = "";

for (let x = 1; x < 11; x  ) {
 
  output  = x   " ";

  if (x == 5) {
     output  = "add something";
  }

}
console.log(output);

CodePudding user response：

One more idea is to use switch statement (Could be more readable for a lot of cases "do something on 1" and "2" and "5" and so on).

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/switch

<script>
 for (let i = 1; i < 11; i  ) {
   switch (i) {
     case 1:
       console.log("hello: "   i);
       break;
     case 5:
       console.log("hello: "   i);
       break;
     default:
       console.log(i);
   }
 }
</script>

default Optional A default clause; if provided, this clause is executed if the value of expression doesn't match any of the case clauses.

** out of topic: it is more common to use i inside for loop (i == index).

CodePudding user response：

If I understand you correctly, you want a string (in this case 5) to be added after each value. If so, Array.prototype.map() will do that job for you.

console.log([1,2,3,4,5,6,7,8,9,10].map(item => item   '5'))

If you want to define 5 for specific values, you can use Array.prototype.filter().

See this example:

// Select only odd numbers and then add the number 5 behind them
console.log([1,2,3,4,5,6,7,8,9,10].filter(value => Math.abs(value % 2) === 1).map(item => item   '5'))