How to Check If an Integer Is in a Given Range

How to elegantly check if a number is within a range?

There are a lot of options:

int x = 30;
if (Enumerable.Range(1,100).Contains(x)) //true

And indeed basic if more elegantly can be written with reversing order in the first check:

if (1 <= x && x <= 100)   //true

Also, check out this SO post for regex options.

Notes:

  • LINQ solution is strictly for style points - since Contains iterates over all items its complexity is O(range_size) and not O(1) normally expected from a range check.

    More generic version for other ranges (notice that second argument is count, not end):

    if (Enumerable.Range(start, end - start + 1).Contains(x)
  • There is temptation to write if solution without && like 1 <= x <= 100 - that look really elegant, but in C# leads to a syntax error "Operator '<=' cannot be applied to operands of type 'bool' and 'int'"

How to check if an integer is within a range of numbers in PHP?

The expression:

 ($min <= $value) && ($value <= $max)

will be true if $value is between $min and $max, inclusively

See the PHP docs for more on comparison operators

How to check if a number falls in a given range

This the simplest way:

    $check = 0;
$nextCheck = $check+1001;
while ($check < 100001) {
If ($user_id > $check && $user_id < $nextCheck) {
// Code ...
break;
} else {
$check+=1000;
$nextCheck+=1000;
}
}

check if number is in given range?

Rather than looping, you can directly check whether:

if n>=r['min'] and n<=r['max']:
return True
else:
return False

Easily check if a number is in a given Range in Dart?

Quite simply, no. Just use 1 <= i && i <= 10.

How to check if an integer is within a range?

Tested your 3 ways with a 1000000-times-loop.

t1_test1: ($val >= $min && $val <= $max): 0.3823 ms

t2_test2: (in_array($val, range($min, $max)): 9.3301 ms

t3_test3: (max(min($var, $max), $min) == $val): 0.7272 ms

T1 was fastest, it was basicly this:

function t1($val, $min, $max) {
return ($val >= $min && $val <= $max);
}

Check if value is between a range of numbers

Use this:

final String checkage = age.getText().toString();
int value = Integer.parseInt(checkage);

if(value >= 4 && value <= 80) {
Toast.makeText(this, "You must be older than 4 and younger than 80", Toast.LENGTH_SHORT).show();
return;
}

'||' won't be useful for you in this case.

How to quickly check if an Integer lies within a given range

You can create a range and check if it contains x:

let contains = (lowerBounds...upperBounds).contains(x)

e.g.:

let successful = (200..<300).contains(httpStatusCode)


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