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Using do-while loop within do-while loops is said to be nested do while loop.
Let us see how neat a syntax of nested do while loop is
do { statement n; do { statement n; } while(test condition); } while(test expression);
The following example program will clearly explain the concept of nested do while loop
#include <stdio.h> int main() { do { printf("I'm from outer do-while loop "); do { printf("\nI'm from inner do-while loop "); } while(1 > 10); } while(2 > 10); return 0; }
Simply, the outer do-while loop contains the inner do-while loop as a set of statements. Though, the test conditions of inner and outer do-while loops are false for the first time. Both the inner and outer statements of do-while loops are executed once, irrespective of their test conditions.
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