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Why does 0.-5 evaluate to -5?
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Suppose I write 0.5 as 0.-5 in unexpected way, but it can still run. What does 0. in 0.-5 do so that it can still run and evaluates to -5?
I also tried alert(0.-5+1) which prints -4, does JavaScript ignore 0. in 0.-5?
javascript numbers
edited 14 mins ago
Community♦
11
asked 6 hours ago
mmmaaammmaaa
2,2431312
add a comment |
Suppose I write 0.5 as 0.-5 in unexpected way, but it can still run. What does 0. in 0.-5 do so that it can still run and evaluates to -5?
I also tried alert(0.-5+1) which prints -4, does JavaScript ignore 0. in 0.-5?
javascript numbers
edited 14 mins ago
Community♦
11
asked 6 hours ago
mmmaaammmaaa
2,2431312
3
0.is like0.0. Or just0.
– Ry-♦
6 hours ago
What makes you think that0.-5is an "unexpected way"?
– Nico Haase
34 mins ago
@NicoHaase: I'm pretty sure the OP used "unexpected way" to mean "I did not intend/expect to write that, but somehow I did".
– Filip Milovanović
7 mins ago
add a comment |
Suppose I write 0.5 as 0.-5 in unexpected way, but it can still run. What does 0. in 0.-5 do so that it can still run and evaluates to -5?
I also tried alert(0.-5+1) which prints -4, does JavaScript ignore 0. in 0.-5?
javascript numbers
edited 14 mins ago
Community♦
11
asked 6 hours ago
mmmaaammmaaa
2,2431312
Suppose I write 0.5 as 0.-5 in unexpected way, but it can still run. What does 0. in 0.-5 do so that it can still run and evaluates to -5?
I also tried alert(0.-5+1) which prints -4, does JavaScript ignore 0. in 0.-5?
javascript numbers
javascript numbers
edited 14 mins ago
Community♦
11
asked 6 hours ago
mmmaaammmaaa
2,2431312
edited 14 mins ago
Community♦
11
asked 6 hours ago
mmmaaammmaaa
2,2431312
edited 14 mins ago
Community♦
11
edited 14 mins ago
Community♦
11
edited 14 mins ago
Community♦
11
11
asked 6 hours ago
mmmaaammmaaa
2,2431312
asked 6 hours ago
mmmaaammmaaa
2,2431312
asked 6 hours ago
mmmaaammmaaa
2,2431312
2,2431312
3
0.is like0.0. Or just0.
– Ry-♦
6 hours ago
What makes you think that0.-5is an "unexpected way"?
– Nico Haase
34 mins ago
@NicoHaase: I'm pretty sure the OP used "unexpected way" to mean "I did not intend/expect to write that, but somehow I did".
– Filip Milovanović
7 mins ago
add a comment |
3
0.is like0.0. Or just0.
– Ry-♦
6 hours ago
What makes you think that0.-5is an "unexpected way"?
– Nico Haase
34 mins ago
@NicoHaase: I'm pretty sure the OP used "unexpected way" to mean "I did not intend/expect to write that, but somehow I did".
– Filip Milovanović
7 mins ago
3
3
0. is like 0.0. Or just 0.– Ry-♦
6 hours ago
0. is like 0.0. Or just 0.– Ry-♦
6 hours ago
What makes you think that
0.-5 is an "unexpected way"?– Nico Haase
34 mins ago
What makes you think that
0.-5 is an "unexpected way"?– Nico Haase
34 mins ago
@NicoHaase: I'm pretty sure the OP used "unexpected way" to mean "I did not intend/expect to write that, but somehow I did".
– Filip Milovanović
7 mins ago
@NicoHaase: I'm pretty sure the OP used "unexpected way" to mean "I did not intend/expect to write that, but somehow I did".
– Filip Milovanović
7 mins ago
add a comment |
2 Answers
2
active
oldest
votes
Trailing digits after a . are optional:
console.log(0. === 0);So
0.-5
evalutes to
0 - 5
which is just -5. Similarly,
0.-5+1
is
0 - 5 + 1
which is
-5 + 1
or -4.
answered 6 hours ago
CertainPerformanceCertainPerformance
88.9k154877
add a comment |
In JS you can express a number with optional decimal point.
x = 5.; //5
x = 5. + 6. //11
And as of Tvde1's comment, any Number methods can be applied too.
5..toString()
answered 5 hours ago
Charlie HCharlie H
9,05342550
1
You can even do5..toString().
– Tvde1
3 hours ago
If fact, you have to do 5..toString() to call the method, otherwise, you have to use parenthesis: (5).toString()
– jo_va
12 mins ago
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Trailing digits after a . are optional:
console.log(0. === 0);So
0.-5
evalutes to
0 - 5
which is just -5. Similarly,
0.-5+1
is
0 - 5 + 1
which is
-5 + 1
or -4.
answered 6 hours ago
CertainPerformanceCertainPerformance
88.9k154877
add a comment |
Trailing digits after a . are optional:
console.log(0. === 0);So
0.-5
evalutes to
0 - 5
which is just -5. Similarly,
0.-5+1
is
0 - 5 + 1
which is
-5 + 1
or -4.
answered 6 hours ago
CertainPerformanceCertainPerformance
88.9k154877
add a comment |
Trailing digits after a . are optional:
console.log(0. === 0);So
0.-5
evalutes to
0 - 5
which is just -5. Similarly,
0.-5+1
is
0 - 5 + 1
which is
-5 + 1
or -4.
answered 6 hours ago
CertainPerformanceCertainPerformance
88.9k154877
Trailing digits after a . are optional:
console.log(0. === 0);So
0.-5
evalutes to
0 - 5
which is just -5. Similarly,
0.-5+1
is
0 - 5 + 1
which is
-5 + 1
or -4.
console.log(0. === 0);console.log(0. === 0);answered 6 hours ago
CertainPerformanceCertainPerformance
88.9k154877
answered 6 hours ago
CertainPerformanceCertainPerformance
88.9k154877
answered 6 hours ago
CertainPerformanceCertainPerformance
88.9k154877
answered 6 hours ago
CertainPerformanceCertainPerformance
88.9k154877
88.9k154877
add a comment |
add a comment |
In JS you can express a number with optional decimal point.
x = 5.; //5
x = 5. + 6. //11
And as of Tvde1's comment, any Number methods can be applied too.
5..toString()
answered 5 hours ago
Charlie HCharlie H
9,05342550
1
You can even do5..toString().
– Tvde1
3 hours ago
If fact, you have to do 5..toString() to call the method, otherwise, you have to use parenthesis: (5).toString()
– jo_va
12 mins ago
add a comment |
In JS you can express a number with optional decimal point.
x = 5.; //5
x = 5. + 6. //11
And as of Tvde1's comment, any Number methods can be applied too.
5..toString()
answered 5 hours ago
Charlie HCharlie H
9,05342550
1
You can even do5..toString().
– Tvde1
3 hours ago
If fact, you have to do 5..toString() to call the method, otherwise, you have to use parenthesis: (5).toString()
– jo_va
12 mins ago
add a comment |
In JS you can express a number with optional decimal point.
x = 5.; //5
x = 5. + 6. //11
And as of Tvde1's comment, any Number methods can be applied too.
5..toString()
answered 5 hours ago
Charlie HCharlie H
9,05342550
In JS you can express a number with optional decimal point.
x = 5.; //5
x = 5. + 6. //11
And as of Tvde1's comment, any Number methods can be applied too.
5..toString()
answered 5 hours ago
Charlie HCharlie H
9,05342550
edited 42 mins ago
answered 5 hours ago
Charlie HCharlie H
9,05342550
answered 5 hours ago
Charlie HCharlie H
9,05342550
answered 5 hours ago
Charlie HCharlie H
9,05342550
9,05342550
1
You can even do5..toString().
– Tvde1
3 hours ago
If fact, you have to do 5..toString() to call the method, otherwise, you have to use parenthesis: (5).toString()
– jo_va
12 mins ago
add a comment |
1
You can even do5..toString().
– Tvde1
3 hours ago
If fact, you have to do 5..toString() to call the method, otherwise, you have to use parenthesis: (5).toString()
– jo_va
12 mins ago
1
1
You can even do
5..toString().– Tvde1
3 hours ago
You can even do
5..toString().– Tvde1
3 hours ago
If fact, you have to do 5..toString() to call the method, otherwise, you have to use parenthesis: (5).toString()
– jo_va
12 mins ago
If fact, you have to do 5..toString() to call the method, otherwise, you have to use parenthesis: (5).toString()
– jo_va
12 mins ago
add a comment |
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3
0.is like0.0. Or just0.– Ry-♦
6 hours ago
What makes you think that
0.-5is an "unexpected way"?– Nico Haase
34 mins ago
@NicoHaase: I'm pretty sure the OP used "unexpected way" to mean "I did not intend/expect to write that, but somehow I did".
– Filip Milovanović
7 mins ago