what's &a meaning during accepting a string ?

Question

char a;
scanf('' %s ", &a);

Answer 1

"The & sign before the variable name is the address operator. It gives the address, or location in memory, of a variable. This is needed because scanf places an input value at a variable address
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Please refer this 👇
https://www.sololearn.com/learn/C/2914/?ref=app