실수 리터럴

[bigsaigon333]

TC

1. PASS

1
2
3
-1
-2
0
-0
100
009
013
35.
0.3
.3
-.8
2.358
-.8e28
1e6
13e-1
234.9e103

7_34.9e1_3
-.3_0e2_4
10_00
10_34.35_24
10_3
-.3_0

2. FAIL

빈문자열
0_2
1__0
01_3
-._03
234.9e103.378
-.3_0e_24
1_
.

[bigsaigon333]

/^(?!(?:|\.)$)-?(?<int>\d*|[1-9](?:_?\d)*)(?:\.(?<fraction>\d*|[1-9](?:_?\d)*))?(?:e(?<exponent>-?(?:\d+|[1-9](?:_?\d)*)))?$/gm