int main() { int i=0,j=1; for(i;i<5;i++); j=i+j; cout<<j; return 0; }

Question

Pls can some one explain this
Why it prints 6??

Answer 1

for-loop has no body in this code (only null statement - semicolon).
for-loop iterates 5 times. After it has been finished "i" will be equal to 5,
"j" will remain unchanged (equals 1)
j=i+j is evaluated as j=5+1 = 6
6 is printed as result.

Answer 2

the for(i; i<5;i++); loop will stop when i=5, as it has no body(due to the semicolon after the statement), it will just increment i. and then j=i+j=5+1=6.