Why does alert(0.-5) print -5?
Suppose I write 0.5 as 0.-5 in unexpected way, but it can still run, my question is , what does "0." in "0.-5" do so that it can still run and prints -5?
I also tried alert(0.-5+1) , which prints -4, does javascript ignores "0." in "0.-5"?
javascript numbers
add a comment |
Suppose I write 0.5 as 0.-5 in unexpected way, but it can still run, my question is , what does "0." in "0.-5" do so that it can still run and prints -5?
I also tried alert(0.-5+1) , which prints -4, does javascript ignores "0." in "0.-5"?
javascript numbers
3
0.
is like0.0
. Or just0
.
– Ry-♦
4 hours ago
add a comment |
Suppose I write 0.5 as 0.-5 in unexpected way, but it can still run, my question is , what does "0." in "0.-5" do so that it can still run and prints -5?
I also tried alert(0.-5+1) , which prints -4, does javascript ignores "0." in "0.-5"?
javascript numbers
Suppose I write 0.5 as 0.-5 in unexpected way, but it can still run, my question is , what does "0." in "0.-5" do so that it can still run and prints -5?
I also tried alert(0.-5+1) , which prints -4, does javascript ignores "0." in "0.-5"?
javascript numbers
javascript numbers
edited 2 hours ago
Charlie H
9,03342550
9,03342550
asked 4 hours ago
mmmaaammmaaa
2,2331311
2,2331311
3
0.
is like0.0
. Or just0
.
– Ry-♦
4 hours ago
add a comment |
3
0.
is like0.0
. Or just0
.
– Ry-♦
4 hours ago
3
3
0.
is like 0.0
. Or just 0
.– Ry-♦
4 hours ago
0.
is like 0.0
. Or just 0
.– Ry-♦
4 hours 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
.
add a comment |
In JS you can express a number with optional decimal point.
x = 5.; //5
x = 5. + 6. //11
You can even do5..toString()
.
– Tvde1
1 hour 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
.
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
.
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
.
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 4 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
You can even do5..toString()
.
– Tvde1
1 hour ago
add a comment |
In JS you can express a number with optional decimal point.
x = 5.; //5
x = 5. + 6. //11
You can even do5..toString()
.
– Tvde1
1 hour ago
add a comment |
In JS you can express a number with optional decimal point.
x = 5.; //5
x = 5. + 6. //11
In JS you can express a number with optional decimal point.
x = 5.; //5
x = 5. + 6. //11
answered 3 hours ago
Charlie HCharlie H
9,03342550
9,03342550
You can even do5..toString()
.
– Tvde1
1 hour ago
add a comment |
You can even do5..toString()
.
– Tvde1
1 hour ago
You can even do
5..toString()
.– Tvde1
1 hour ago
You can even do
5..toString()
.– Tvde1
1 hour ago
add a comment |
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3
0.
is like0.0
. Or just0
.– Ry-♦
4 hours ago