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dragon731012
GitHub Repository: dragon731012/-WORKING-bookmarklets-and-games
Path: blob/main/tests (don't work)/check if integer
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'10.0' % 1; // returns 0
10 % 1; // returns 0
'10.5' % 1; // returns 0.5
10.5 % 1; // returns 0.5

num % 1 != 0
// 23 % 1 = 0
// 23.5 % 1 = 0.5

Number.isInteger(23);  // true
Number.isInteger(1.5); // false
Number.isInteger("x"); // false: 

string.indexOf(".") == -1;