D, 133 127 126 125 121 119 bytes

import std.conv,std.stdio;void f(T)(T a,T b,T s=0){for(T j;j++<s;)' '.write;a.writeln;if(a-b)f(a+1,b,s+a.text.length);}

Jelly and APL were taken.

Try it online!

If you're fine with console-dependent results (goes off the same principle as Giacomos's C answer) here's one for 72 71 bytes:

import std.stdio;void f(T)(T a,T b){while(a<=b){a++.write;'\v'.write;}}

##How? (Only D specific tricks)

• f(T)(T a,T b,T s=0) D's template system can infer types
• for(T j;j++<s;) Integers default to 0.
• ' '.write;a.writeln D lets you call fun(arg) like arg.fun (one of the few golfy things D has)
• a.text.length Same as above, and D also allows you to call a method with no parameters as if it was a property (text is conversion to string)

D, 133 127 126 125 121 119 bytes

import std.conv,std.stdio;void f(T)(T a,T b,T s=0){for(T j;j++<s;)' '.write;a.writeln;if(a-b)f(a+1,b,s+a.text.length);}

Jelly and APL were taken.

Try it online!

If you're fine with console-dependent results (goes off the same principle as Giacomos's C answer) here's one for 72 71 bytes:

import std.stdio;void f(T)(T a,T b){while(a<=b){a++.write;'\v'.write;}}

##How? (Only D specific tricks)

• f(T)(T a,T b,T s=0) D's template system can infer types
• for(T j;j++<s;) Integers default to 0.
• ' '.write;a.writeln D lets you call fun(arg) like arg.fun (one of the few golfy things D has)
• a.text.length Same as above, and D also allows you to call a method with no parameters as if it was a property (text is conversion to string)
• One thing that might be relevant (I didn't use this though) newlines can be in strings!

D, 133 127 126 125 bytes

import std.conv,std.stdio;void f(int a,int b,long s=0){for(int j;j++<s;)' '.write;a.writeln;if(a-b)f(a+1,b,s+a.text.length);}

Jelly and APL were taken.

Try it online!

If you're fine with console-dependent results (goes off the same principle as Giacomos's C answer) here's one for 72 bytes:

import std.stdio;void f(int a,int b){while(a<=b){a++.write;'\v'.write;}}

D, 133 127 126 125 121 119 bytes

import std.conv,std.stdio;void f(T)(T a,T b,T s=0){for(T j;j++<s;)' '.write;a.writeln;if(a-b)f(a+1,b,s+a.text.length);}

Jelly and APL were taken.

Try it online!

If you're fine with console-dependent results (goes off the same principle as Giacomos's C answer) here's one for 72 71 bytes:

import std.stdio;void f(T)(T a,T b){while(a<=b){a++.write;'\v'.write;}}

##How? (Only D specific tricks)

• f(T)(T a,T b,T s=0) D's template system can infer types
• for(T j;j++<s;) Integers default to 0.
• ' '.write;a.writeln D lets you call fun(arg) like arg.fun (one of the few golfy things D has)
• a.text.length Same as above, and D also allows you to call a method with no parameters as if it was a property (text is conversion to string)

D, 133 127 126 bytes

import std.conv,std.stdio;void f(int a,int b,ulong s=0){for(int j;j++<s;)' '.write;a.writeln;if(a-b)f(a+1,b,s+a.text.length);}

Jelly and APL were taken.

Try it online!

If you're fine with console-dependent results (goes off the same principle as Giacomos's C answer) here's one for 72 bytes:

import std.stdio;void f(int a,int b){while(a<=b){a++.write;'\v'.write;}}

D, 133 127 126 125 bytes

import std.conv,std.stdio;void f(int a,int b,long s=0){for(int j;j++<s;)' '.write;a.writeln;if(a-b)f(a+1,b,s+a.text.length);}

Jelly and APL were taken.

Try it online!

If you're fine with console-dependent results (goes off the same principle as Giacomos's C answer) here's one for 72 bytes:

import std.stdio;void f(int a,int b){while(a<=b){a++.write;'\v'.write;}}