Why can't i modify the year variable in following javascript program?
-5
why the year variable is not modified ? For example i subtract 1 from year variable but it is not reflected in the global variable why ? This is a program to check your age but it is giving the output age + 1.
My Javascript code is as follows:
var currentAge = function(birthDay, birthMonth, birthYear) {
var birthDay, birthYear, birthMonth;
var yearDiff, lst, day, year, month;
var date = new Date();
day = (date.getDate());
year = (date.getFullYear());
month = ([date.getMonth()] + 1);
var daysPresent = function(birthDay) {
if (day >= birthDay) {
return (day - birthDay);
} else if (day < birthDay) {
day += 31;
month -= 1;
return (day - birthDay);
}
};
var monthsPresent = function(birthMonth) {
if (month >= birthMonth) {
return (month - birthMonth);
} else if (month < birthMonth) {
month = +month + 12;
year = +year - 1;
return (month - birthMonth);
}
};
var yearsPresent = function(birthYear) {
return (year - birthYear);
}
var abc = [yearsPresent(birthYear), monthsPresent(birthMonth), daysPresent(birthDay)];
return abc;
}
var cu = currentAge(28, 9, 1994);
console.log(cu);javascript
edited Jan 19 at 5:00
Amy
21.7k1874131
asked Jan 18 at 19:08
indianMonkindianMonk
12
|
show 2 more comments
-5
why the year variable is not modified ? For example i subtract 1 from year variable but it is not reflected in the global variable why ? This is a program to check your age but it is giving the output age + 1.
My Javascript code is as follows:
var currentAge = function(birthDay, birthMonth, birthYear) {
var birthDay, birthYear, birthMonth;
var yearDiff, lst, day, year, month;
var date = new Date();
day = (date.getDate());
year = (date.getFullYear());
month = ([date.getMonth()] + 1);
var daysPresent = function(birthDay) {
if (day >= birthDay) {
return (day - birthDay);
} else if (day < birthDay) {
day += 31;
month -= 1;
return (day - birthDay);
}
};
var monthsPresent = function(birthMonth) {
if (month >= birthMonth) {
return (month - birthMonth);
} else if (month < birthMonth) {
month = +month + 12;
year = +year - 1;
return (month - birthMonth);
}
};
var yearsPresent = function(birthYear) {
return (year - birthYear);
}
var abc = [yearsPresent(birthYear), monthsPresent(birthMonth), daysPresent(birthDay)];
return abc;
}
var cu = currentAge(28, 9, 1994);
console.log(cu);javascript
edited Jan 19 at 5:00
Amy
21.7k1874131
asked Jan 18 at 19:08
indianMonkindianMonk
12
3
Please add some context to your question. Which line are you referring to? What are you expecting, and how does that differ from the result?
– Tyler Roper
Jan 18 at 19:10
if you want any variable to be constant, declare it with aconstkeyword instead ofvar
– Yousaf
Jan 18 at 19:13
I have to imagine that the title is a typo, and OP meant "Why can't I". Asking "Why can I change this variable?" doesn't seem to make much sense.
– Tyler Roper
Jan 18 at 19:16
To be honest, either way it doesn't make sense, because the variable isn't declared const. What is the challenge in changing the value of a non-constant variable?
– Amy
Jan 18 at 19:18
1
@TylerRoper I agree enough that I'm going to reverse that edit. Changing the question so it says the complete opposite of what the OP said is potentially destructive. If the OP says "yeah that's what I meant" then we can change it back.
– Amy
Jan 18 at 19:30
|
show 2 more comments
-5
-5
-5
0
why the year variable is not modified ? For example i subtract 1 from year variable but it is not reflected in the global variable why ? This is a program to check your age but it is giving the output age + 1.
My Javascript code is as follows:
var currentAge = function(birthDay, birthMonth, birthYear) {
var birthDay, birthYear, birthMonth;
var yearDiff, lst, day, year, month;
var date = new Date();
day = (date.getDate());
year = (date.getFullYear());
month = ([date.getMonth()] + 1);
var daysPresent = function(birthDay) {
if (day >= birthDay) {
return (day - birthDay);
} else if (day < birthDay) {
day += 31;
month -= 1;
return (day - birthDay);
}
};
var monthsPresent = function(birthMonth) {
if (month >= birthMonth) {
return (month - birthMonth);
} else if (month < birthMonth) {
month = +month + 12;
year = +year - 1;
return (month - birthMonth);
}
};
var yearsPresent = function(birthYear) {
return (year - birthYear);
}
var abc = [yearsPresent(birthYear), monthsPresent(birthMonth), daysPresent(birthDay)];
return abc;
}
var cu = currentAge(28, 9, 1994);
console.log(cu);javascript
edited Jan 19 at 5:00
Amy
21.7k1874131
asked Jan 18 at 19:08
indianMonkindianMonk
12
why the year variable is not modified ? For example i subtract 1 from year variable but it is not reflected in the global variable why ? This is a program to check your age but it is giving the output age + 1.
My Javascript code is as follows:
var currentAge = function(birthDay, birthMonth, birthYear) {
var birthDay, birthYear, birthMonth;
var yearDiff, lst, day, year, month;
var date = new Date();
day = (date.getDate());
year = (date.getFullYear());
month = ([date.getMonth()] + 1);
var daysPresent = function(birthDay) {
if (day >= birthDay) {
return (day - birthDay);
} else if (day < birthDay) {
day += 31;
month -= 1;
return (day - birthDay);
}
};
var monthsPresent = function(birthMonth) {
if (month >= birthMonth) {
return (month - birthMonth);
} else if (month < birthMonth) {
month = +month + 12;
year = +year - 1;
return (month - birthMonth);
}
};
var yearsPresent = function(birthYear) {
return (year - birthYear);
}
var abc = [yearsPresent(birthYear), monthsPresent(birthMonth), daysPresent(birthDay)];
return abc;
}
var cu = currentAge(28, 9, 1994);
console.log(cu);var currentAge = function(birthDay, birthMonth, birthYear) {
var birthDay, birthYear, birthMonth;
var yearDiff, lst, day, year, month;
var date = new Date();
day = (date.getDate());
year = (date.getFullYear());
month = ([date.getMonth()] + 1);
var daysPresent = function(birthDay) {
if (day >= birthDay) {
return (day - birthDay);
} else if (day < birthDay) {
day += 31;
month -= 1;
return (day - birthDay);
}
};
var monthsPresent = function(birthMonth) {
if (month >= birthMonth) {
return (month - birthMonth);
} else if (month < birthMonth) {
month = +month + 12;
year = +year - 1;
return (month - birthMonth);
}
};
var yearsPresent = function(birthYear) {
return (year - birthYear);
}
var abc = [yearsPresent(birthYear), monthsPresent(birthMonth), daysPresent(birthDay)];
return abc;
}
var cu = currentAge(28, 9, 1994);
console.log(cu);var currentAge = function(birthDay, birthMonth, birthYear) {
var birthDay, birthYear, birthMonth;
var yearDiff, lst, day, year, month;
var date = new Date();
day = (date.getDate());
year = (date.getFullYear());
month = ([date.getMonth()] + 1);
var daysPresent = function(birthDay) {
if (day >= birthDay) {
return (day - birthDay);
} else if (day < birthDay) {
day += 31;
month -= 1;
return (day - birthDay);
}
};
var monthsPresent = function(birthMonth) {
if (month >= birthMonth) {
return (month - birthMonth);
} else if (month < birthMonth) {
month = +month + 12;
year = +year - 1;
return (month - birthMonth);
}
};
var yearsPresent = function(birthYear) {
return (year - birthYear);
}
var abc = [yearsPresent(birthYear), monthsPresent(birthMonth), daysPresent(birthDay)];
return abc;
}
var cu = currentAge(28, 9, 1994);
console.log(cu);javascript
javascript
edited Jan 19 at 5:00
Amy
21.7k1874131
asked Jan 18 at 19:08
indianMonkindianMonk
12
edited Jan 19 at 5:00
Amy
21.7k1874131
asked Jan 18 at 19:08
indianMonkindianMonk
12
edited Jan 19 at 5:00
Amy
21.7k1874131
edited Jan 19 at 5:00
Amy
21.7k1874131
edited Jan 19 at 5:00
Amy
21.7k1874131
21.7k1874131
asked Jan 18 at 19:08
indianMonkindianMonk
12
asked Jan 18 at 19:08
indianMonkindianMonk
12
asked Jan 18 at 19:08
indianMonkindianMonk
12
12
3
Please add some context to your question. Which line are you referring to? What are you expecting, and how does that differ from the result?
– Tyler Roper
Jan 18 at 19:10
if you want any variable to be constant, declare it with aconstkeyword instead ofvar
– Yousaf
Jan 18 at 19:13
I have to imagine that the title is a typo, and OP meant "Why can't I". Asking "Why can I change this variable?" doesn't seem to make much sense.
– Tyler Roper
Jan 18 at 19:16
To be honest, either way it doesn't make sense, because the variable isn't declared const. What is the challenge in changing the value of a non-constant variable?
– Amy
Jan 18 at 19:18
1
@TylerRoper I agree enough that I'm going to reverse that edit. Changing the question so it says the complete opposite of what the OP said is potentially destructive. If the OP says "yeah that's what I meant" then we can change it back.
– Amy
Jan 18 at 19:30
|
show 2 more comments
3
Please add some context to your question. Which line are you referring to? What are you expecting, and how does that differ from the result?
– Tyler Roper
Jan 18 at 19:10
if you want any variable to be constant, declare it with aconstkeyword instead ofvar
– Yousaf
Jan 18 at 19:13
I have to imagine that the title is a typo, and OP meant "Why can't I". Asking "Why can I change this variable?" doesn't seem to make much sense.
– Tyler Roper
Jan 18 at 19:16
To be honest, either way it doesn't make sense, because the variable isn't declared const. What is the challenge in changing the value of a non-constant variable?
– Amy
Jan 18 at 19:18
1
@TylerRoper I agree enough that I'm going to reverse that edit. Changing the question so it says the complete opposite of what the OP said is potentially destructive. If the OP says "yeah that's what I meant" then we can change it back.
– Amy
Jan 18 at 19:30
3
3
Please add some context to your question. Which line are you referring to? What are you expecting, and how does that differ from the result?
– Tyler Roper
Jan 18 at 19:10
Please add some context to your question. Which line are you referring to? What are you expecting, and how does that differ from the result?
– Tyler Roper
Jan 18 at 19:10
if you want any variable to be constant, declare it with a
const keyword instead of var– Yousaf
Jan 18 at 19:13
if you want any variable to be constant, declare it with a
const keyword instead of var– Yousaf
Jan 18 at 19:13
I have to imagine that the title is a typo, and OP meant "Why can't I". Asking "Why can I change this variable?" doesn't seem to make much sense.
– Tyler Roper
Jan 18 at 19:16
I have to imagine that the title is a typo, and OP meant "Why can't I". Asking "Why can I change this variable?" doesn't seem to make much sense.
– Tyler Roper
Jan 18 at 19:16
To be honest, either way it doesn't make sense, because the variable isn't declared const. What is the challenge in changing the value of a non-constant variable?
– Amy
Jan 18 at 19:18
To be honest, either way it doesn't make sense, because the variable isn't declared const. What is the challenge in changing the value of a non-constant variable?
– Amy
Jan 18 at 19:18
1
1
@TylerRoper I agree enough that I'm going to reverse that edit. Changing the question so it says the complete opposite of what the OP said is potentially destructive. If the OP says "yeah that's what I meant" then we can change it back.
– Amy
Jan 18 at 19:30
@TylerRoper I agree enough that I'm going to reverse that edit. Changing the question so it says the complete opposite of what the OP said is potentially destructive. If the OP says "yeah that's what I meant" then we can change it back.
– Amy
Jan 18 at 19:30
|
show 2 more comments
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3
Please add some context to your question. Which line are you referring to? What are you expecting, and how does that differ from the result?
– Tyler Roper
Jan 18 at 19:10
if you want any variable to be constant, declare it with a
constkeyword instead ofvar– Yousaf
Jan 18 at 19:13
I have to imagine that the title is a typo, and OP meant "Why can't I". Asking "Why can I change this variable?" doesn't seem to make much sense.
– Tyler Roper
Jan 18 at 19:16
To be honest, either way it doesn't make sense, because the variable isn't declared const. What is the challenge in changing the value of a non-constant variable?
– Amy
Jan 18 at 19:18
1
@TylerRoper I agree enough that I'm going to reverse that edit. Changing the question so it says the complete opposite of what the OP said is potentially destructive. If the OP says "yeah that's what I meant" then we can change it back.
– Amy
Jan 18 at 19:30