Faa JavaScript isFinite()

Maelezo na matumizi

isFinite() Kifaa huzuni kinaweza kubadilika namba kama namba yaliyotumika kwa upofu.

Hatakiwa thamani inayotumia +infinity, -infinity au NaN (hakuna namba), kifo cha kifaa huzuni hupinga huzuni, inayotumia huzuni.

Mfano

Tunia namba kama namba yaliyotumika kwa upofu:

var a = isFinite(123) + "<br>";
var b = isFinite(-1.23) + "<br>";
var c = isFinite(5-2) + "<br>";
var d = isFinite(0) + "<br>";
var e = isFinite("123") + "<br>";
var f = isFinite("Hello") + "<br>";
var g = isFinite("2005/12/12");
var res = a + b + c + d + e + f + g;

Mwongozo wa kumwambia

Inasababu

isFinite(value)

Tukio wa thamani

Tukio Maelezo
value Inayohitaji. Inayotestwa na thamani.

Vifaa ya kidhako

Mwongozo wa kuja: Tupu. Hatakiwa kama +infinity, -infinity au NaN, hatarisha huzuni, inayotumia hatakiwa wakati huzuni.
Toleo la JavaScript: ECMAScript 1

Msaada wa kifungu

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isFinite() Msaada Msaada Msaada Msaada Msaada