Eloquent JavaScript Recursion Return? -

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i having hard time understanding recursion in eloquent javascript, easy know happening cannot understand why..

function power(base, exponent) { if (exponent == 0) return 1;  else return base * power(base, exponent - 1); /* 2*2*2, returns base?  thought @ first was, 2*(2,3-1) return 2*(2,2)?  calling until reach 0, why exponent out?*/ }  console.log(power(2, 3)); // → 8

recursive functions can expressed loop. see adaptation:

function power(base, exponent) {     var result = 1;     (var = 0; < exponent; i++)         result *= base;     return result; }

as can see, exponent doesn't play role @ in output, represents number of loops make.

in world of recursion, exponent represents number of times function has yet call before can return.

this youtube video visualizes recursion nicely: computerphile


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