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Why we use do-while loop in c?

It is also called as post tested loop. It is used when it is necessary to execute the loop at least one time. Syntax:

do {

Loop body

} while (Expression);

Example:

int main(){

int num,i=0;

do{

printf(“To enter press 1\n”);

printf(“To exit press  2”);

scanf(“%d”,&num);

++i;

switch(num){

case 1:printf(“You are welcome\n”);break;

default : exit(0);

}

}

while(i<=10);

return 0;

}

Output: 3 3 4 4

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