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The Num lock should always be enabled. If it is disabled when you are attempting an alt code, it may cause errors or unexpected results in some applications. For example, Alt+4 could be interpreted as Alt +, ← which causes the browser to go back if the Num lock is disabled.
If your laptop keyboard doesn't have a separate NumPad, you should hold FN button with Alt button while typing the code.
This method does not work for Linux system, but it is possible to use Unicode.

Greater than Symbol

Greater than symbol takes the shape of two equals lines joining at an acute angle.

In math, it indicated the inequality between two values, and the greater value faces the open end of the symbol signals that the first number or value is greater than the other. The documents show that greater than sign was known as far as the 1650s. The same symbol is used in programming languages. ( ≫) - This symbol is called double Greater Than. It is used for approximation of the much greater than a sign. Triple greater than sign (⋙) in computer means that you are in the firmware console.

How to use and type Greater than symbol code?

If your keyboard contains separate NumPad, you should be sure that it is enabled. If it is not, press the Num Lock key to activate it then press hold down the Alt key on the left side. Type the number that represents that character or the symbol you want to insert and then release the insert key.
For example, for the greek letter omega Ω press and hold Alt and the type 0234 and then release.
There is another method that works only for word documents. In this method, you should type the characters first then press Alt and X. For example ( 0234 + Alt + X for greek letter omega ).
If you have a keyboard that doesn't have NumPad here is what will work for you. Find the Function key ( FN ) then presses and hold the function key while holding press and release Num LK key; then release FN key. This method will activate the numeric keypad in your laptop.
Then do the same steps as in the previous example.
Notice that in IBM code you don't use 0 (Alt + 255 ) before the code which is different from the windows generator that requires to add 0 (Alt + 0255 ) before the code.

Table of Symbols and Codes

Symbol	Title / Description	Unicode	Code / HTML Code
⪚	Double-line Equal To Or Greater-than	⪚	⪚
≯	Not Greater-than	≯	≯
≵	Neither Greater-than Nor Equivalent To	≵	≵
>	Greater-than	>	>
≱	Neither Greater-than Nor Equal To	≱	≱
⍄	Apl Functional Symbol Quad Greater-than	⍄	⍄
⫺	Double-line Slanted Greater-than Or Equal To	⫺	⫺
⩺	Greater-than With Circle Inside	⩺	⩺
⪞	Similar Or Greater-than	⪞	⪞
⥸	Greater-than Above Rightwards Arrow	⥸	⥸
⪧	Greater-than Closed By Curve	⪧	⪧
≧	Greater-than Over Equal To	≧	≧
⪜	Double-line Slanted Equal To Or Greater-than	⪜	⪜
⪢	Double Nested Greater-than	⪢	⪢
⪈	Greater-than And Single-line Not Equal To	⪈	⪈
⪆	Greater-than Or Approximate	⪆	⪆
⍩	Apl Functional Symbol Greater-than Diaeresis	⍩	⍩
≩	Greater-than But Not Equal To	≩	≩
⩾	Greater-than Or Slanted Equal To	⩾	⩾
⪘	Slanted Equal To Or Greater-than With Dot Inside	⪘	⪘
⪂	Greater-than Or Slanted Equal To With Dot Above	⪂	⪂
≳	Greater-than Or Equivalent To	≳	≳
≥	Greater-than Or Equal To	≥	≥
＞	Fullwidth Greater-than	＞	＞
⋗	Greater-than With Dot	⋗	⋗
⪠	Similar Above Greater-than Above Equals	⪠	⪠
⪖	Slanted Equal To Or Greater-than	⪖	⪖
⋝	Equal To Or Greater-than	⋝	⋝
⪎	Greater-than Above Similar Or Equal	⪎	⪎
⪊	Greater-than And Not Approximate	⪊	⪊
⫸	Triple Nested Greater-than	⫸	⫸
﹥	Small Greater-than	﹥	﹥
⧁	Circled Greater-than	⧁	⧁
⪩	Greater-than Closed By Curve Above Slanted Equal	⪩	⪩
⪄	Greater-than Or Slanted Equal To With Dot Above Left	⪄	⪄
⪀	Greater-than Or Slanted Equal To With Dot Inside	⪀	⪀
≫	Much Greater-than	≫	≫
⩼	Greater-than With Question Mark Above	⩼	⩼
⋧	Greater-than But Not Equivalent To	⋧	⋧
⋙	Very Much Greater-than	⋙	⋙