Very new to unity and C# and the code I wrote for jumping isn't working

[heavy gull]

This code contains my players movement as-well as its jump but the jump just isn't working. it doesn't seem to be the input that doesn't work so im hoping some of you experts with experience could help out a novice like me.

[eager star]

!code

[willow pond]

Posting code

📃 Large Code Blocks

Use links to services like:
https://paste.mod.gg/, https://hastebin.skyra.pw/, https://paste.ofcode.org/, https://paste.myst.rs/

📃 Inline Code

Surround code with three backquotes. Not quotation marks.
To format as C#, add cs to the first line:
```cs
// Your code here
```
Add a comment with a line number if there is an error message.