Question

for example the output is a=20 I want to change the number “20” to another number and write the result at the same place of first output, not in a new line (the earliest amount of “a” is not required just the last result is important)
I try to avoid something like this:

output:

a=20
a=21
a=70
.
.
.

Answer 1

Have you tried this:

printf("\ra=%d",a);
// \r=carriage return, returns the cursor to the beginning of current line