A bit more about numbers

TypeScript does not have separate types for integer and float values, only number. Be aware that the computations that result in a floating point value might not be what you’re expecting.

• numbers.ts
• Output

console.log("7 / 3 =", 7 / 3);
console.log("7.0 / 3.0 =", 7.0 / 3.0);
console.log("2.33 * 3 =", 2.33 * 3);
console.log("2.3333333333333335 * 3 =", 2.3333333333333335 * 3);
  

7 / 3 = 2.3333333333333335
7.0 / 3.0 = 2.3333333333333335
2.33 * 3 = 6.99
2.3333333333333335 * 3 = 7
  

You can use Math.ceil, Math.floor, and Math.round to convert to an integer rounded up, down, or to the nearest, respectively.

Try using Deno’s REPL (read-eval-print-loop) for experimenting. Enter deno repl (or just simply deno) in your terminal.

$ deno
Deno 1.12.1
exit using ctrl+d or close()
> Math.ceil(.95)
1
> Math.ceil(7/3)
3
> Math.floor(7/3)
2
> Math.round(7/3)
2

If you want to obtain a string value of the result of a calculation to a particular precision, you can use toPrecision() to specify the number of significant digits.

> (7/3).toPrecision(3)
"2.33"
> (2).toPrecision(4)
"2.000"