C++ for loop syntax

C++ for loop

for (initialization; condition; update) {
    // body of-loop 
}

C++ for loop syntax

for(int i =0; i<6;++i){//initialize;condition;updation
  cout<<i<<endl;//code block
}//first it initializes, then checks the condition, then runs the code block and at last updates 'i'

Define for loop c++

#define FOR(x,a,b) for(int x = a; x <= b; x++)
#define FOD(x,a,b) for(int x = a; x >= b; x--)
#define REP(x,a,b) for(int x = a; x < b; x++)
#define RED(x,a,b) for(int x = a; x > b; x--)

C++ for loops

#include <iostream>
#define FOR(i,a) for (int i = 0; i < a; i++)

FOR(i, 3) cout << i << endl;

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