✅ To allow 🕊️ To leave unchanged 🏠 To rent out 🎾 A replayed serve 💻 A code keyword

let

1 7.7

A word used in code to create a name that holds a value only inside a part of the program

noun
/lɛt/

Specialized

: let

The syntax to declare a variable with let allows for better control of the scope in your code.

Examples

In JavaScript, you can use let to declare a variable with block scope.
To create a constant in programming, you might use let for variable declaration within a function.
So we're going to let S be a set.
Now let P be fixed and let N go to Infinity.
OK, so here I'm saying if we let N equal to the size of Z.
So I'm going to say let publisher equal our session.
Well, when I did this, I let X equal sine of X, correct?
Another choice is to let X equals vy.
Now let us take a closer look at these riders of Rohan.
So let's say I have a var like hello, and it's an optional, optional string, let's say, and I want the string.

Idioms

let alone

185 3.4

To say that one thing is even less likely or possible than another

let me tell you

Informal

64 4.4

To start a story or show that what follows is important

let alone

21 3.0

To show that something is even less likely than what was just mentioned

to let bygones be bygones

10 5.3

Forgive past fights so they do not affect the present

to let one's hair down

Informal

8 5.6

Relax and enjoy yourself after being serious or busy

to let the chips fall where they may

Informal

6 7.8

To accept what happens and not try to change the result

to let the cat out of the bag

Informal

5 5.1

To tell a secret that should be kept

to let sleeping dogs lie

Informal

4 6.9

Avoid talking about old problems to prevent more arguments

let me guess

Informal

3 4.6

Said when you are about to say what you think happened

to let go and let God

1 9.1

Give up control and trust God or a higher power

to let the grass grow under someone's feet

Informal

1 8.6

Wait too long to act and miss a chance

don't let the bedbugs bite

Baby Talk

8.4

A playful goodnight wish hoping someone has good dreams

to let crazy stick its dick in someone

Offensive

9.9

To let strong, uncontrolled feelings make your life worse

to let fluffy off the chain

Informal

9.9

To allow someone to act freely after a time of control

let it snow

5.4

To say this to show you want it to snow

to let this cup pass from me

Archaic

9.9

To ask or hope, often in prayer, not to have a hard time

to let your freak flag fly

Slang

9.8

Show your true self to others, even if it seems strange

to let the bedbugs bite

Informal

9.8

To wish someone a good night as a joke

Compounds

let-off

1 4.7

A case where someone is excused from punishment, often only warned

let-off

Specialized

1 9.4

The percentage a compound bow's pull drops at full draw, making it easier to hold

Surface Forms

let singular

lets plural

Etymology

Let in programming borrows the everyday verb let meaning 'allow'. Think of it as saying 'allow this name here', which is why a let variable only works inside a small part of the code.