Go: package main

import (
	"fmt"
	"strconv"
)

func main() {
	for _, leftValue := range MultiplicationTableNum(9) {
		for _, rightValue := range MultiplicationTableNum(9) {
			strLeftVal, strRightVal, strMulti := strconv.Itoa(leftValue), strconv.Itoa(rightValue), strconv.Itoa(Multiplication(leftValue, rightValue))
			fmt.Println(strLeftVal + "x" + strRightVal + "=" + strMulti)
		}
	}
}

func MultiplicationTableNum(num int) []int {
	multiNum := []int{}
	for i := 1; i <= num; i++ {
		multiNum = append(multiNum, i)
	}
	return multiNum
}

func Multiplication(x, y int) int {
	return x * y
}

C++: #include <bits/stdc++.h>
using namespace std;
#define FOR(i, s, n) for(int i = s; i < (int)n; i++)
#define per(i, n) for(int i = n; i >= 0; i--)
#define ROF(i, s, n) for(int i = s; i >= (int)n; i--)
#define FORIT(i, A) for (auto i : A)
#define PRINT(x) cout << (x) << "\n"
#define ALL(a) (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define MP make_pair
#define EACH(i, n) for (__typeof((n).begin()) i = (n).begin(); i != (n).end(); ++i)
#define SZ(a) int((a).size())
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())
#define CLR(a) memset((a), 0 ,sizeof(a))
#define NCLR(a) memset((a), -1 ,sizeof(a))
#define sq(n) (n) * (n)
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;
typedef vector<LL> VLL;
typedef vector<VLL> VVLL;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef priority_queue<int> maxpq;
typedef priority_queue< int, vector<int>, greater<int> > minpq;
typedef complex<double> P;
static const double EPS = 1e-10;
static const double PI = acos( -1.0 );
static const int mod = 1000000007;
static const int INF = 1 << 29;
static const LL LL_INF = 1152921504606846976;
static const int dx[] = { -1, 0, 1, 0, 1, -1, 1, -1 };
static const int dy[] = { 0, -1, 0, 1, 1, 1, -1, -1 };

#ifdef _DEBUG
#define dump(x) cout << #x << " = " << (x) << "\n"
#define debug(x) cout << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << "\n"
#else
#define dump(x)
#define debug(x)
#endif


int main() {
#ifdef _DEBUG
	printf( "Debug Mode\n" );
#endif
	for ( int i = 1; i < 10; i++ ) {
		for ( int j = 1; j < 10; j++ ) {
			dump( i );
			dump( j );
			printf( "%dx%d=%d\n", i, j, i * j );
		}
	}
	return 0;
}

C++: #include<iostream>
using namespace std;

int main(){
    for(int j=1;j<=9;j++)
	for(int i=1;i<=9;i++)
	    cout<<j<<'x'<<i<<'='<<j*i<<'\n';
	    //printf("%dx%d = %d",j,i,j*i);
    return 0;
}

C++: #include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include<iomanip>
#include <cmath>
#include <queue>
#include <stack>
#include <map>
#include <cstdio>

using namespace std;

int main()
{
	for (int i = 1; i <= 9; ++i)
	{
		for (int j = 1; j <= 9; ++j)
		{
			cout<<i<<"x"<<j<<"="<<i*j<<endl;
		}
	}
	return 0;
}

C++: #include <iostream>

using namespace std;

int main()
{
  int x,y;
  for(x=1;x<10;x++){
      for(y=1;y<10;y++){
          cout << x << "x" << y << "=" << x*y << endl;
      }
  }
}

C++: #include <iostream>
using namespace std;
#define N 9

int main(){
    for(int i=1; i<=N; i++){
        for(int j=1; j<=N; j++){
            cout << i << "x" << j << "=" << (i*j) << "\n";
        }
    }
    return 0;
}

C++: #include <iostream>
using namespace std;

int main() {
  int a = 1;
  int b = 1;
  for ( a == 9 && b == 10) {
    cout << a << "x" << b << "=" << a*b << endl;
    ++b;
    if ( b = 10) {
      ++a;
      int b = 1;
    }

  }

  return 0;

}

C++: #include <iostream>
using namespace std;

int main(void){
	for(int i=1;i<10;i++){
		for(int j=1;j<10;j++){
			cout<<i<<"x"<<j<<"="<<i*j<<endl;
		}
	}

	return 0;
}

C++: #include <iostream>
using namespace std;
int main()
{
	for(int i=1;i<=9;i++){
		for(int j=1;j<=9;j++){
			cout<<i<<"x"<<j<<"="<<i*j<<endl;;
		}
	}
	return 0;
}

C++: #include<bits/stdc++.h>
#include<cstdio>
#include<sstream>
#include<cstdlib>
#include<cctype>
#include<cmath>
#include<algorithm>
#include<set>
#include<queue>
#include<stack>
#include<list>
#include<iostream>
#include<fstream>
#include<numeric>
#include<string>
#include<vector>
#include<cstring>
#include<map>
#include<iterator>

using namespace std;
#define EPS 1e-9
#define MAX 505
#define pb push_back
#define mp make_pair
#define ins insert
#define fi first
#define se second
#define pi acos(-1.0)
#define mod 100000007
#define inf 2147483647
#define ll long long int
#define sss stringstream
#define oss ostringstream
#define iss istringstream
#define llu long long unsigned

#define _sq(a) (a)*(a)
#define sz(a) ((int)a.size())
#define gcd(a,b)    __gcd(a,b)
#define lcm(a,b) ((a)*((b)/gcd(a,b)))
#define _max3(a,b,c) max(a, max(b,c))
#define _min3(a,b,c) min(a, min(b,c))
#define FOR(i, n) for(i=0; i<(int)n; i++)
#define FOR1(i, n) for(i=1; i<=(int)n; i++)
#define mem(a) memset(a, 0, sizeof(a))
#define _set(a) memset(a,-1,sizeof(a))
#define FORI(i, a, b) for(i=a; i>=(int)b; i--)
#define FORab(i, a, b) for(i=a; i<=(int)b; i++)
#define popcount(n) __builtin_popcount(n)
#define popcountl(n) __builtin_popcountll(n)
#define sort_rev(a) sort(a.rbegin(), a.rend())
#define sort_all(a) sort(a.begin(), a.end())
#define dis_twopoints(x1,y1,x2,y2) sqrt(_sq(x1-x2) + _sq(y1-y2))
#define foreach(i,n) for(__typeof((n).begin())i =(n).begin();i!=(n).end();i++)

//If Long Long (mask & (1LL << k))
#define check(mask, k) (mask & (1 << k))
#define set1(mask, k) (mask | (1 << k))
#define set0(mask ,k) (mask & (~(1<<k)))

#define SD(a) scanf("%d",&a)
#define SLF(a) scanf("%lf",&a)
#define SC(a) scanf("%c",&a)
#define SS(a) scanf("%s",a)
#define SLLD(a) scanf("%lld", &a)
#define Si64(a) scanf("%I64d", &a)

#define READ(f) freopen(f, "r", stdin)
#define WRITE(f) freopen(f, "w", stdout)

int main()
{
     int i,j;
     for(i=1;i<=9;i++)
     {
         for(j=1;j<=9;j++)
         {
             cout<<i<<"*"<<j<<"="<<i*j<<endl;
         }
     }
    return 0;
}

C++: #include<iostream>
using namespace std;

int main()
{
	int a=0,b=0;
	for(int i=0;i<9;i++)
	{
		a++;
		b=0;
		for(int j=0;j<9;j++){
			b++;
			cout<<a<<"x"<<b<<"="<<a*b<<endl;
		}
	}
}

C++: // Undone
#include <bits/stdc++.h>
#define int long long
#define double long double
#define INF 1e18
using namespace std;
signed main() {
  for (int i = 1; i < 10; i++) {
    for (int j = 1; j < 10; j++) {
      cout << i << "x" << j << "=" << i*j << endl;
    }
  }    
}

C++: #include<iostream>
using namespace std;
int main()
{
    int i,j;
    for(i=1;i<=9;i++)
    {
        for(j=1;j<=9;j++)
        {
            cout<<i<<"x"<<j<<"="<<i*j<<endl;
        }
    }
    return 0;
}

C++: #include<iostream>

using namespace std;
int main()
{
	for(int i(1);i<10;i++)
	{
		for(int j(1);j<10;j++)
		{
			int prod=i*j;
			cout<<i<<'*'<<j<<'='<<prod<<endl;
		}
	}
	cout<<endl;
	return 0;	
}

C++: #include<iostream>
using namespace std;
int main(){
    
    for(int i=1;i<10;i++){
      for(int j=1; j<10;j++){
          cout<<i<<"x"<<j<<"="<<i*j<<endl;
          
     }
    }  
 
  return 0;
}

C++: #include<iostream>

int main(){
  for(int i=1; i<=9; i++){
    for(int j=1; j<=9; j++){
      std::cout << i << "x" << j << "=" << i*j <<'\n';
    }
  }
  return 0;
}